file size is not a issue, i have a couple of mobile games, some fps
and evry serious(sounds like a joke) mobile gamer has a sd card.
Most of the fps games are 500mb to 1.5GB+ and companys such as Rockstar games ported their GTA Series Titles to mobile, their file size is reasonable high.
At the end am sure that one can/ could create a low res version of the game and a HD Version, this am sure will be possible with reloaded, later down the road.
http://j0linar.blogspot.co.at/
PC SPECS: Windows 8 Pro 64-bit, Intel I7-3630QM 4.8GHz CPU, Nvidia GTX 675M - 2048MB GPU, 16GB DDR3 RAM