SteamOS will be a free operating system designed for living rooms that Valve says "combines the rock-solid architecture of Linux with a gaming experience built for the big screen." The company has promised that it will have "hundreds of games" that will come to the new operating system next year. You will be able to access the entire Steam catalog via "in-home streaming.
In a press release Valve said that it had managed to get significant performance increases in graphics processing, and we’re now targeting audio performance and reductions in input latency at the operating system level.
"Game developers are already taking advantage of these gains as they target SteamOS for their new releases," Valve said.
The games pictured on the new SteamOS website are Trine 2, Metro: Last Light, Europa Universalis IV, Rome II: Total War, and Football Manager 2013. Valve also announced four new features that will be available both for SteamOS and the standard Steam platform: streaming, family sharing, parental restrictions, and options for movies, music, and other media.