I have an idea to get more games developed for linux. Vow to never again buy a non-native linux game. Call it the "No Non Native Gamer" movement (N3G), or whatever.. I have considered the consequences, and would wait it out, even for a couple years!
If you take a second to consider its not difficult to envision the progression to seeing mainstreams titles popping up in the repos, apt-get install Left4Dead2 But seriously, first it would become the ideal platform to kickstart indie game developers, these companies would grow with the funding of abstinent gamers trying to get some action, which would cause larger companies to feel threatened. This threat would rise in the ranks until eventually guys like valve won't just be trying to get something working, they would have to! It might even become straight up profitable to port to this percentile of the market?
Some might argue why bother? Valves looks like they are trying, and hell unity is now 100% supported in linux. I would argue it is for exactly that reason we should. The time is just right. N3Gs unite!... or whatever