I think Actiblizz', Valve's, and the other bigger game companies' new found love for Linux is a bluff. IMO they're trying to put some pressure on Microsoft to rethink its Win8 market place. I really don't think the big game companies want to irritate their customers with Linux and its not very consumer friendly "compile your own files" approach. Yeah, I know, it's easy to use for nerds, but we're talking the Average Joe Steam customer here.
Consoles? I owned two: a Pong clone and an Atari 2600. And that's it.