So it is about to begin beta testing its streaming service, which will let users beam games from a PC to a Steam client in another room.
Valve's kicking off the beta testing this year, and to be in with a shot of getting picked you need to go and sign up to this group over on the Steam Community.
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Steam Machines will only be able to play Linux games natively so you'll need to be able to stream your other games from a PC in order to play them on Valve's living room box.
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Going on what we've seen so far, it looks like we'll be able to alter the bandwidth and framerate of a stream but there are still plenty of questions about how things like Family Sharing will work with all of this.