Valve Software isn't big on release dates, but it had previously expressed intentions to have its various hardware partners rolling out their Steam Machines -- custom-designed, living room-tailored PCs running Linux-base SteamOS -- and Steam Controllers during 2014. In a recent post on the Steam Universe community group
however, Valve's Eric Hope has indicated that it won't be seeing a wide release until at least next year -- essentially, the latest victim of the Valve Time
We’re now using wireless prototype controllers to conduct live playtests, with everyone from industry professionals to die-hard gamers to casual gamers. It's generating a ton of useful feedback, and it means we'll be able to make the controller a lot better. Of course, it's also keeping us pretty busy making all those improvements. Realistically, we're now looking at a release window of 2015, not 2014.
Obviously we're just as eager as you are to get a Steam Machine in your hands. But our number one priority is making sure that when you do, you'll be getting the best gaming experience possible. We hope you'll be patient with us while we get there. Until then, we’ll continue to post updates as we have more stories to share.
SteamOS is of course, still available for download
for install on existing PCs, but the software is still very much considered beta, and currently recommended for tinkerers and Linux-adept only.