Valve announces their own operating system SteamOS
In the first of their three major games related announcements Valve has unveiled their own operating system designed for gaming in the living room.
SteamOS has been built by combining Linux's reliability and affordability with Steam's unparalleled gaming experience to create an operating system tailor made for living room gaming PCs. SteamOS also brings in some new features (that will also be available through the Steam client too) one of which is the Family Sharing service which is already in beta allowing everyone in a household to access one library of games through their own personal steam accounts.
Valve has also announced that they will be working to provide music, TV and movie services through Steam offering the same kind of complete entertainment options that the consoles aspire to.
Steam will get more family options than just the Family Sharing though. Everyone in the house will be able to sign in and view their own personalised libraries in the living room so they won't have to wade through everyone else's games to get to what they want to play.
Valve promises all of this is coming soon and SteamOS, like the Steam client before it will be free to download for everyone.