After the betas, it's out now! Not much info yet, they did say final version would work with 4k streaming, but here's what Valve poste:
http://steamcommunity.com/groups/homestream#announcements/detail/1443820649963834564
I love my Steam Link, but if they put this on my Android TV built into the TV I have, then it would be baller
Samsung has released a free Steam Link app for their 2016 and 2017 Smart TVs!
You can find it by searching for Steam in the Smart Hub app store.
Please make sure that your TV firmware is updated to the latest version for the best experience.
Supported Controllers:
Steam Controller
Xbox 360 wired and wireless
Xbox One wired
Logitech F510/F710
You can provide feedback to Samsung on the Steam Link discussion group
http://steamcommunity.com/groups/homestream#announcements/detail/1443820649963834564
I love my Steam Link, but if they put this on my Android TV built into the TV I have, then it would be baller