You are literally comparing different things here. Remix is based on Android. Android is a slimmed down version of Linux, that slimming removes almost all of the code required to accomplish this. Count how many Windows video games are brought to Linux, and do the math from there. Load up Linux, and see how well you can run windows based games there, and come back and ask the question again.
If you want to game, dual boot, OR start talking to game developers about developing for this platform. The OS has everything they need already, not necessarily for AAA titles, but it's still a good base. Supporting gaming doesn't come from the OS, it comes from the company making the game. Start posting on their boards.