Just looked through the list. A quarter of the listed games are Crusader Kings II and all it's DLC. It's a good game, but...
As a mac user, I don't see a good reason to get a Linux box for steam as most the Linux games are also for OSX. This is important to me as I am completely open to the next generation of consoles. Nintendo is automatically out but I have been considering going back to windows if the next generation of playstation and Xbox do not excite me. If the Linux steam catalog was at least in the ball park of the windows catalog I would consider it.
It's still in beta and they are probably restricting the number of entries for now. My guess is that when the client if officially stable you will see much more games made available.
As a mac user, I don't see a good reason to get a Linux box for steam as most the Linux games are also for OSX. This is important to me as I am completely open to the next generation of consoles. Nintendo is automatically out but I have been considering going back to windows if the next generation of playstation and Xbox do not excite me. If the Linux steam catalog was at least in the ball park of the windows catalog I would consider it.