a new operating system for playing vedio games ...

check  out this link (How to install SteamOS on your computer   How To - CNET.html)
(http://howto.cnet.com/8301-11310_39-57618021-285/how-to-install-steamos-on-your-computer/)
A beta version of Valve's gaming operating system is now available for download. Here's how you can transform your current computer into a Steam Machine....