This is pretty cool and I really hope they are able to bring more and more big name games over. If it wasn't for gaming I would have switch to Linux along time ago and I believe that tons of gamers out there feel the same way. I'll be honest, if we put aside the business, enterprise, education, etc...market for a moment, this would put a decent size dent in Microsoft user base if all gamers could play all their favourite games on Linux. Granted they would still have the largest market share due to their business/enterprise market, but there are lots of gamers out there that are just using windows for gaming and would gladly switch if they could play them on another OS.