Why not? Missing games are the last and only "serious" issue of Linux. Well, maybe apart from Adobes product. But that's quite seriuos: Not being able to play normal and modern games is why I have Windows installed, and it's why i couldn't convince my nonexisting kids to use linux solely.
More Games means more user means more games (means better gpu-driver). It's a really old theory, and i think it's one that is sound, that linux somehow has to start the spirale and end the issue of having not enough user for games and therefor not enough games for users. Steam with some Valve-games could change that indeed.