Interesting idea, I think it could work. If it does there will be a lot of people moving away from Windows I think. As long as Steam OS also runs everything else (like other Linux distros do) or it won't work.
There is also another announcement in 10 minutes. It will be something living room based like all 3 announcements, probably the Steam Box thingy
http://store.steampowered.com/livingroom/
There is also another announcement in 10 minutes. It will be something living room based like all 3 announcements, probably the Steam Box thingy
http://store.steampowered.com/livingroom/