Valve understands that without other incentives for developers to target Linux, gamers will never switch. It's looking to be a huge win for the FOSS community.
The future games I see being game changers for Linux are Half Life 3, Portal 3 and the new Left 4 Dead - these are all games that would work well with the steam controller on the Linux box and would drive sales to the Steambox.
> work well with the steam controller on the Linux box and would drive sales to the Steambox.
I am a gamer on Linux, but there's no reason these games will run better on Linux vs Windows or use the controller better (since they will probably support the controller drivers for Windows systems as well). Valve has repeatedly said they would not do any exclusive titles for any platform as well, so I don't think just a couple of great games will drive much Steambox sales. There are going to be several drivers for Steamboxes: 1) the hardware needs to be cheap enough 2) the experience needs to be seamless and AS GOOD as a console if not more 3) enough big games to ensure you do not miss too much by not staying on Windows.