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[REQUEST] "Matter Casting" (Matter Casting platform) support in OpenVoiceOS? - Add support for this new open standard protocol for local video and audio streaming
#293
Please consider adding "Matter Casting" platform support to the OpenVoiceOS platform for smart speakers. This new(ish) open standard Matter Casting protocol is aimed at democratizing local video and audio casting + remote control in a universal way that can be supported by all ecosystems and platforms to make cross-plaform casting and remote control less fractured, hopefully paving the way for broad industry adoption in the future.
"Matter Casting" is a new standardized open protocol media streaming standard and the Matter Casting APIs for casting video and audio streams over a local network is only a small part of the currently much-hyped Matter standard suite for IoT which is being led, promoted as a new cross-ecosystem being developed by the CSA (Connectivity Standards Alliance)) and its member companies.
It would be awesome if OpenVoiceOS and similar open-source projecs would also work to add some kind of native "Matter Casting" compatible music streaming and audio player. i.e. an A/V-receiver endpoint, (without some third-party integration acting as an external middleware). As such I am hoping that you eventually want to add support for some cross-ecosystem support for this "Matter Casting" protocol as a standardized audio streaming protocol for audio player / media player endpoint features, and even more I hope that you consider getting involved early and give them feedback to be able to help shape roadmap for this new protocol.
FYI, while Matter Casting video has previously been prioritized they are now looking at prioritizing audio-only streaming for music playback as well, and The Verge recently posted an update from Chris LaPré, CTO of the Connectivity Standards Alliance (CSA) and posted a new article about Matter Casting, most notibly saying that “a new streaming speaker device type and related controls” is under development a new Matter complatible smart home standard for smart speakers is being led by a former Sonos executive looking to disrupt the smart speaker market, (the article even mentions the Home Assistant open-source project though how exactly it fits into this context is unclear at this time):
Another FYI, chrisdecenzo (Chris DeCenzo from Amazon who is the lead Matter Casting developer and a member is in the Matter working group, a.k.a. Project CHIP) wrote recently that there is an official effort within the Matter working group (in Project CHIP) right now to define use cases for "Matter Casting" to audio players and smart speakers or voice assistants within the Matter standard (but only Matter members can join a Matter working group and participate with that work as far as known), see his comment here about joining that effort:
Anyway, "Matter Casting" (also wrongly referred to as "Matter Cast") is a technology standard that uses open APIs to enable you to cast video and/or audio content from your smartphone, tablet, and computer to your TV or smart display and smart speakers / audio-recievers + voice assistant appliances. Matter Casting is primarily meant to let you cast content and control playback from an app on your phone/tablet to an app running on a TV, smart display or smart speaker. From an end-user's point-of-view Matter Casting is meant to work the same thing as Google Cast, Apple AirPlay, and Miracast or other similar streaming media protocols for sharing multimedia on a local network, with a few major differences: implementing support for this "Matter Casting" is royalty-free and it is based on open-source code, so not proprietary. That means it is designed from the ground up to be a "free and open source" video and audio casting/streaming standard for the best possible cross-platform compatibility.
Matter casting is an open protocol that does not require specific hardware, only that the app on your source device and the app on the target device you are casting to both have the feature enabled. So again, from an end-users point-of-view it is essentially like Apple’s AirPlay or Google Cast but can be available to every app or hardware maker to implement and not limited to specific mobile OS and ecosystems, or partnerships, however under the hood Matter Casting is also superior to those other protocols in many ways.
Matter Casting upstream development looks to be progressing nicely, it is now used on Amazon Fire OS7 and as such Matter Casting for video streaming is already available on the latest Amazon Fire TV and Amazon Echo Show 15, however support for Matter Casting on the mobile app side it is so far only available from Amazon's Prime Video app the and the STARZ app, but Amazon wrote that they are working on Plex, Pluto TV, Sling TV, STARZ, and ZDF to add Matter Casting support from those during last year:
At the same time Amason has also announced that Amazon's propriatory "Amazon Fling" second-screen service will be discontinued from the 5th of March 2026 as it will be fully replaced by the new Matter Casting standard:
See this screenshot captured from around 1-year ago showning all "Matter Casting" options available at that time through Amazon's Prime Video app on an iPhone to a Pixel Tablet and Chromecast with Google TV device via Chromecast and to Echo Show 15 devices through Matter Casting:
Matter Casting framework introduction
A Casting Client (e.g. a mobile phone app) is expected to be a Matter
Commissionable Node and a CastingPlayer (i.e. a TV) is expected to be a Matter
Commissioner. In the context of the Matter Video Player architecture, a CastingPlayer would map to Casting "Video" Player. The CastingPlayer is
expected to be hosting one or more Endpoints (some of which can represent
Content Apps in the Matter Video Player architecture) that support one or more
Matter Media Clusters.
Matter Casting APIs
Matter Casting consists of three parts:
The mobile app: For most content providers, this would be your
consumer-facing mobile app. By making your mobile app a Matter "Casting
Client", you enable the user to discover casting targets, cast content, and
control casting sessions. The example Matter tv-casting-app
for Android / iOS and Linux builds on top of the Matter SDK to demonstrate
how a TV Casting mobile app works.
The TV content app: For most content providers, this would be your
consumer-facing app on a Smart TV. By enhancing your TV app to act as a
Matter "Content app", you enable Matter Casting Clients to cast content. The example Matter content-app
for Android builds on top of the Matter SDK to demonstrate how a TV Content
app works.
The TV platform app: The TV platform app implements the Casting Video
Player device type and provides common capabilities around media playback on
the TV such as play/pause, keypad navigation, input and output control,
content search, and an implementation of an app platform as described in the
media chapter of the device library specification. This is generally
implemented by the TV manufacturer. The example Matter tv-app
for Android builds on top of the Matter SDK to demonstrate how a TV platform
app works.
This document describes how enable your Android and iOS apps to act as a Matter
"Casting Client". This documentation is also designed to work with the example example Matter tv-casting-app
samples so you can see the experience end to end.
"In a brief demo at CES, Amazon showed how users would get all the features of its Prime Video app while casting, including its X-Ray feature, and could then back out from the video player to the Prime Video menu. Chris DeCenzo, the senior principal engineer at Amazon who led Matter Casting development, confirmed that with linear apps such as Sling TV, you might be able to flip through channels with the TV remote after launching a channel through Matter Casting.
“It actually is a different architecture from what you see with the other casting protocols,” DeCenzo says. “Matter Casting is really about communicating with apps on the TV.”
Chromecast doesn’t work quite the same way. On Android TV and Google TV devices, Chromecast’s video streams are usually separate from the in-app versions, so you can’t get full controls with your regular remote. While Google does offer a way for apps to connect directly with Chromecast, I haven’t seen any major streaming services use this feature except Netflix. And if you’re using Chromecast on a different TV platform such as Vizio SmartCast, there’s no app connection at all.
Apple’s AirPlay has a similar limitation: Videos you launch via AirPlay are separate from the apps on your TV, and using AirPlay even precludes you from playing other media on the iPhone or iPad from which the video is streaming.
All of which mean that Matter Casting will feel more like an extension of the apps on your TV than an entirely separate way to watch video. That might make you more likely to use it in the first place."
Again, Matter Casting is in its infancy and its current architecture still looks to be missing audio playback features specifically for music, such as audio-only or multi-room and real-time audio synchronization to allow for synchronized multi-room music playback, but at least is it already supporting Android, Darwin (for iOS and Mac), and Linux, allowing any developer to implement it into its products. Hopefully ensuring wider-spread compatibility between devices of different manufacturers and ecosystems.
So the reason why I think this is interesting is that it is the first attempt by the technology consortium governing the overall Matter standard suite to create also an open standard for local video and audio casting that is meant for broader adoption across different ecosystems for interoperability.
Matter in general already has hundreds of member companies, but understand that not everyone has publicly committed to every part of that standard, as most have only announced support for the IoT parts that control smart devices, however, support for additional device types is being announced regularly. "Matter Casting" is needed in this toolkit for streaming audio and video locally in a unified way.
Matter Casting adoption has so far been announced by Amazon who will first add support to newer Amazon Fire TV and Amazon Echo Show series of smart display devices via an upcoming firmware update, (in which it sounds like they might initially only implement video streaming?).
More interestingly, Amazon has already embraced Matter Casting fully have publicly stated that they do not plan on ever adding support for Google Cast or Apple AirPlay video casting to their newer Fire OS based devices (running Amazon's Fire OS 7 or higher). This is just hot from the press of the CES 2024 (Consumer Electronics Show yearly tech event):
"Amazon is a long-time supporter of using open technology standards to give customers more choice over the devices and services they use in their homes. That’s also why Amazon is a founding member and key contributor to the Matter Standard. At CES, Amazon announced Matter Casting, which enables customers to cast content to Fire TV and Echo Show 15 devices directly from supported streaming apps on iOS and Android. Customers can begin watching a movie or browse for their next favorite show from Prime Video on their phone, and cast it to their compatible Fire TV device or Echo Show 15. This is an industry-first demonstration of implementing Matter Casting."
"Chris DeCenzo (a principal engineer at Amazon who works on Alexa and Fire OS devices) says that if all the big companies adopted Matter Casting, it would be better for the industry, as app developers would only have to develop for one protocol — one of the founding principles of the Matter smart home standard. “We believe in open standards,” he says, “because it simplifies things for developers."
"Additionally, it would make things easier for customers. Casting from apps would work with every streaming box, TV, and smart display, and you wouldn’t have to think about what hardware you have in order to cast your content. That sounds great in theory, but — as with Matter in general — it looks like it will be a long journey to get there."
Again, The Verge recently posted got an update from Chris LaPré which most notibly says that “a new streaming speaker device type and related controls” is under development a new Matter complatible smart home standard for smart speakers is being led by a former Sonos executive looking to disrupt the smart speaker market,
According to Fiede Schillmoeller, CEO of Legato, the Dutch company is leading the group developing this new Matter smart speaker specification.
Legato is working with CSA member companies that are speaker manufacturers, software makers, ecosystems, and content providers, said Schillmoeller. The group is “fully focused on making audio and speakers work through Matter,” he said. While he declined to name names, he said, “It includes everyone you would want in that group.” (It’s worth noting that both Sonos and Bose are members of the CSA.)
“We want smart homes to have this ambient information stream [and] speakers are a big enabler of that”
The specifics of how speakers will work are still under development, so Schillmoeller couldn’t share exact details, but he confirmed that the team is building something that will handle “all the important stuff.”
This should include choosing your audio source, controlling volume and full transport controls, “play, pause, skip ... all these things that help you control the speaker from any device you like,” he said. If implemented, this would mean you could control any Matter speaker from any Matter-supported ecosystem app, such as Apple Home, Alexa, Google Home, and Home Assistant.
Schillmoeller also hopes the team can integrate speakers with your smart home through scenes. “You should be able to use your smart home to drive speaker behavior,” he said. “Set what type of music plays in the morning when you wake up, what happens to your speaker when you leave the house, what happens to the audio when someone rings your doorbell.” Functions like these are available in smart home ecosystems today but are limited to proprietary software and hardware.
Matter won’t enable multiroom music, a feature likely to remain at the ecosystem level.
What Matter probably won’t do is enable multiroom music, a feature likely to remain at the ecosystem level. Additionally, don’t hold out hope that Apple and Google, and possibly Amazon, will enable their speakers as Matter device types. While it’s technically possible with Matter, controlling your Apple HomePod from your Google Nest Hub just doesn’t feel likely. I’d love to be proven wrong, though.
PS: This feature request for "Matter Casting" support (also sometimes referred to as MatterCasting or MatterCast) is simply meant as an informal feature request that can also be as an open discussion about this new open video and audio streaming standard and Matter Casting API/protocol that might eventually become an industry-standard in the future, meant to replace or compete directly with proprietary and closed source media streaming protocols used by Google Cast (Google Chromecast), Apple's AirPlay (formerly AirTunes for AirPort), Alexa Cast (Amazon Alexa / Amazon Echo), and Miracast (from the Wi-Fi Alliance that replaced Intel's WiDi screen mirroring technology). Being an enthusiast of open-source software and non-proprietary standards I am personally hoping for an eventual industry-wide adoption of this new open standard for casting video and audio streams in the future.
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Please consider adding "Matter Casting" platform support to the OpenVoiceOS platform for smart speakers. This new(ish) open standard Matter Casting protocol is aimed at democratizing local video and audio casting + remote control in a universal way that can be supported by all ecosystems and platforms to make cross-plaform casting and remote control less fractured, hopefully paving the way for broad industry adoption in the future.
"Matter Casting" is a new standardized open protocol media streaming standard and the Matter Casting APIs for casting video and audio streams over a local network is only a small part of the currently much-hyped Matter standard suite for IoT which is being led, promoted as a new cross-ecosystem being developed by the CSA (Connectivity Standards Alliance)) and its member companies.
It would be awesome if OpenVoiceOS and similar open-source projecs would also work to add some kind of native "Matter Casting" compatible music streaming and audio player. i.e. an A/V-receiver endpoint, (without some third-party integration acting as an external middleware). As such I am hoping that you eventually want to add support for some cross-ecosystem support for this "Matter Casting" protocol as a standardized audio streaming protocol for audio player / media player endpoint features, and even more I hope that you consider getting involved early and give them feedback to be able to help shape roadmap for this new protocol.
Here are GitHub code links:
https://github.com/project-chip/connectedhomeip/blob/master/examples/tv-casting-app/APIs.md
https://github.com/project-chip/connectedhomeip/tree/master/examples/tv-app
https://github.com/project-chip/connectedhomeip/tree/master/examples/tv-casting-app
FYI, while Matter Casting video has previously been prioritized they are now looking at prioritizing audio-only streaming for music playback as well, and The Verge recently posted an update from Chris LaPré, CTO of the Connectivity Standards Alliance (CSA) and posted a new article about Matter Casting, most notibly saying that “a new streaming speaker device type and related controls” is under development a new Matter complatible smart home standard for smart speakers is being led by a former Sonos executive looking to disrupt the smart speaker market, (the article even mentions the Home Assistant open-source project though how exactly it fits into this context is unclear at this time):
https://www.theverge.com/2025/1/2/24332848/speakers-matter-smart-home-apple-google-amazon-legato
Another FYI, chrisdecenzo (Chris DeCenzo from Amazon who is the lead Matter Casting developer and a member is in the Matter working group, a.k.a. Project CHIP) wrote recently that there is an official effort within the Matter working group (in Project CHIP) right now to define use cases for "Matter Casting" to audio players and smart speakers or voice assistants within the Matter standard (but only Matter members can join a Matter working group and participate with that work as far as known), see his comment here about joining that effort:
Btw, you can also follow some of the public development progress for Matter's TV & Media Device Type on the project-chip project:
Anyway, "Matter Casting" (also wrongly referred to as "Matter Cast") is a technology standard that uses open APIs to enable you to cast video and/or audio content from your smartphone, tablet, and computer to your TV or smart display and smart speakers / audio-recievers + voice assistant appliances. Matter Casting is primarily meant to let you cast content and control playback from an app on your phone/tablet to an app running on a TV, smart display or smart speaker. From an end-user's point-of-view Matter Casting is meant to work the same thing as Google Cast, Apple AirPlay, and Miracast or other similar streaming media protocols for sharing multimedia on a local network, with a few major differences: implementing support for this "Matter Casting" is royalty-free and it is based on open-source code, so not proprietary. That means it is designed from the ground up to be a "free and open source" video and audio casting/streaming standard for the best possible cross-platform compatibility.
https://www.theverge.com/2024/5/10/24153556/fire-tv-amazon-matter-casting-hands-on
Matter casting is an open protocol that does not require specific hardware, only that the app on your source device and the app on the target device you are casting to both have the feature enabled. So again, from an end-users point-of-view it is essentially like Apple’s AirPlay or Google Cast but can be available to every app or hardware maker to implement and not limited to specific mobile OS and ecosystems, or partnerships, however under the hood Matter Casting is also superior to those other protocols in many ways.
Matter Casting upstream development looks to be progressing nicely, it is now used on Amazon Fire OS7 and as such Matter Casting for video streaming is already available on the latest Amazon Fire TV and Amazon Echo Show 15, however support for Matter Casting on the mobile app side it is so far only available from Amazon's Prime Video app the and the STARZ app, but Amazon wrote that they are working on Plex, Pluto TV, Sling TV, STARZ, and ZDF to add Matter Casting support from those during last year:
https://developer.amazon.com/docs/fire-tv/overview-of-matter-casting.html
https://www.developer.amazon.com/docs/fire-tv/matter-casting-integration.html
At the same time Amason has also announced that Amazon's propriatory "Amazon Fling" second-screen service will be discontinued from the 5th of March 2026 as it will be fully replaced by the new Matter Casting standard:
See this screenshot captured from around 1-year ago showning all "Matter Casting" options available at that time through Amazon's Prime Video app on an iPhone to a Pixel Tablet and Chromecast with Google TV device via Chromecast and to Echo Show 15 devices through Matter Casting:
Matter Casting framework introduction
A Casting Client (e.g. a mobile phone app) is expected to be a Matter
Commissionable Node and a
CastingPlayer(i.e. a TV) is expected to be a MatterCommissioner. In the context of the Matter Video Player architecture, a
CastingPlayerwould map to Casting "Video" Player. TheCastingPlayerisexpected to be hosting one or more
Endpoints(some of which can representContent Apps in the Matter Video Player architecture) that support one or more
Matter Media
Clusters.Matter Casting APIs
Matter Casting consists of three parts:
consumer-facing mobile app. By making your mobile app a Matter "Casting
Client", you enable the user to discover casting targets, cast content, and
control casting sessions. The
example Matter tv-casting-app
for Android / iOS and Linux builds on top of the Matter SDK to demonstrate
how a TV Casting mobile app works.
consumer-facing app on a Smart TV. By enhancing your TV app to act as a
Matter "Content app", you enable Matter Casting Clients to cast content. The
example Matter content-app
for Android builds on top of the Matter SDK to demonstrate how a TV Content
app works.
Player device type and provides common capabilities around media playback on
the TV such as play/pause, keypad navigation, input and output control,
content search, and an implementation of an app platform as described in the
media chapter of the device library specification. This is generally
implemented by the TV manufacturer. The
example Matter tv-app
for Android builds on top of the Matter SDK to demonstrate how a TV platform
app works.
This document describes how enable your Android and iOS apps to act as a Matter
"Casting Client". This documentation is also designed to work with the example
example Matter tv-casting-app
samples so you can see the experience end to end.
More references
https://www.techhive.com/article/2200884/matter-casting-looks-superior-to-airplay-chromecast-can-it-win.html
"In a brief demo at CES, Amazon showed how users would get all the features of its Prime Video app while casting, including its X-Ray feature, and could then back out from the video player to the Prime Video menu. Chris DeCenzo, the senior principal engineer at Amazon who led Matter Casting development, confirmed that with linear apps such as Sling TV, you might be able to flip through channels with the TV remote after launching a channel through Matter Casting.
“It actually is a different architecture from what you see with the other casting protocols,” DeCenzo says. “Matter Casting is really about communicating with apps on the TV.”
Chromecast doesn’t work quite the same way. On Android TV and Google TV devices, Chromecast’s video streams are usually separate from the in-app versions, so you can’t get full controls with your regular remote. While Google does offer a way for apps to connect directly with Chromecast, I haven’t seen any major streaming services use this feature except Netflix. And if you’re using Chromecast on a different TV platform such as Vizio SmartCast, there’s no app connection at all.
Apple’s AirPlay has a similar limitation: Videos you launch via AirPlay are separate from the apps on your TV, and using AirPlay even precludes you from playing other media on the iPhone or iPad from which the video is streaming.
All of which mean that Matter Casting will feel more like an extension of the apps on your TV than an entirely separate way to watch video. That might make you more likely to use it in the first place."
https://www.youtube.com/watch?v=1MxLAiAQm8M&ab_channel=AlexaDevelopers
Again, Matter Casting is in its infancy and its current architecture still looks to be missing audio playback features specifically for music, such as audio-only or multi-room and real-time audio synchronization to allow for synchronized multi-room music playback, but at least is it already supporting Android, Darwin (for iOS and Mac), and Linux, allowing any developer to implement it into its products. Hopefully ensuring wider-spread compatibility between devices of different manufacturers and ecosystems.
So the reason why I think this is interesting is that it is the first attempt by the technology consortium governing the overall Matter standard suite to create also an open standard for local video and audio casting that is meant for broader adoption across different ecosystems for interoperability.
https://csa-iot.org/all-solutions/matter/
Because the Matter standard matters if adopted as the foundation for all connected things:
https://csa-iot.org/newsroom/building-a-standard-that-really-matters/
Matter in general already has hundreds of member companies, but understand that not everyone has publicly committed to every part of that standard, as most have only announced support for the IoT parts that control smart devices, however, support for additional device types is being announced regularly. "Matter Casting" is needed in this toolkit for streaming audio and video locally in a unified way.
Matter Casting adoption has so far been announced by Amazon who will first add support to newer Amazon Fire TV and Amazon Echo Show series of smart display devices via an upcoming firmware update, (in which it sounds like they might initially only implement video streaming?).
More interestingly, Amazon has already embraced Matter Casting fully have publicly stated that they do not plan on ever adding support for Google Cast or Apple AirPlay video casting to their newer Fire OS based devices (running Amazon's Fire OS 7 or higher). This is just hot from the press of the CES 2024 (Consumer Electronics Show yearly tech event):
https://www.aboutamazon.com/news/devices/amazon-ces-2024-announcements
"Amazon is a long-time supporter of using open technology standards to give customers more choice over the devices and services they use in their homes. That’s also why Amazon is a founding member and key contributor to the Matter Standard. At CES, Amazon announced Matter Casting, which enables customers to cast content to Fire TV and Echo Show 15 devices directly from supported streaming apps on iOS and Android. Customers can begin watching a movie or browse for their next favorite show from Prime Video on their phone, and cast it to their compatible Fire TV device or Echo Show 15. This is an industry-first demonstration of implementing Matter Casting."
https://www.theverge.com/2024/1/9/24030324/amazon-matter-casting-echo-show-fire-tv-prime-video
"Chris DeCenzo (a principal engineer at Amazon who works on Alexa and Fire OS devices) says that if all the big companies adopted Matter Casting, it would be better for the industry, as app developers would only have to develop for one protocol — one of the founding principles of the Matter smart home standard. “We believe in open standards,” he says, “because it simplifies things for developers."
"Additionally, it would make things easier for customers. Casting from apps would work with every streaming box, TV, and smart display, and you wouldn’t have to think about what hardware you have in order to cast your content. That sounds great in theory, but — as with Matter in general — it looks like it will be a long journey to get there."
https://www.aboutamazon.com/news/devices/amazon-ces-2024-announcements
Again, The Verge recently posted got an update from Chris LaPré which most notibly says that “a new streaming speaker device type and related controls” is under development a new Matter complatible smart home standard for smart speakers is being led by a former Sonos executive looking to disrupt the smart speaker market,
https://www.theverge.com/2025/1/2/24332848/speakers-matter-smart-home-apple-google-amazon-legato
According to Fiede Schillmoeller, CEO of Legato, the Dutch company is leading the group developing this new Matter smart speaker specification.
Legato is working with CSA member companies that are speaker manufacturers, software makers, ecosystems, and content providers, said Schillmoeller. The group is “fully focused on making audio and speakers work through Matter,” he said. While he declined to name names, he said, “It includes everyone you would want in that group.” (It’s worth noting that both Sonos and Bose are members of the CSA.)
“We want smart homes to have this ambient information stream [and] speakers are a big enabler of that”
The specifics of how speakers will work are still under development, so Schillmoeller couldn’t share exact details, but he confirmed that the team is building something that will handle “all the important stuff.”
This should include choosing your audio source, controlling volume and full transport controls, “play, pause, skip ... all these things that help you control the speaker from any device you like,” he said. If implemented, this would mean you could control any Matter speaker from any Matter-supported ecosystem app, such as Apple Home, Alexa, Google Home, and Home Assistant.
Schillmoeller also hopes the team can integrate speakers with your smart home through scenes. “You should be able to use your smart home to drive speaker behavior,” he said. “Set what type of music plays in the morning when you wake up, what happens to your speaker when you leave the house, what happens to the audio when someone rings your doorbell.” Functions like these are available in smart home ecosystems today but are limited to proprietary software and hardware.
Matter won’t enable multiroom music, a feature likely to remain at the ecosystem level.
What Matter probably won’t do is enable multiroom music, a feature likely to remain at the ecosystem level. Additionally, don’t hold out hope that Apple and Google, and possibly Amazon, will enable their speakers as Matter device types. While it’s technically possible with Matter, controlling your Apple HomePod from your Google Nest Hub just doesn’t feel likely. I’d love to be proven wrong, though.
PS: This feature request for "Matter Casting" support (also sometimes referred to as MatterCasting or MatterCast) is simply meant as an informal feature request that can also be as an open discussion about this new open video and audio streaming standard and Matter Casting API/protocol that might eventually become an industry-standard in the future, meant to replace or compete directly with proprietary and closed source media streaming protocols used by Google Cast (Google Chromecast), Apple's AirPlay (formerly AirTunes for AirPort), Alexa Cast (Amazon Alexa / Amazon Echo), and Miracast (from the Wi-Fi Alliance that replaced Intel's WiDi screen mirroring technology). Being an enthusiast of open-source software and non-proprietary standards I am personally hoping for an eventual industry-wide adoption of this new open standard for casting video and audio streams in the future.
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