I wish there was a stream only hardware box we could get that I can plug into my TV. Maybe they could port the stream receiver to Android?
SteamOS http://store.steampowered.com/livingroom/SteamOS/ and http://store.steampowered.com/steamos/ will allow for building your own box and they've got third parties working on a "broad range" of hardware options that will come pre-installed with the OS.