One of the biggest thing I have noticed.... and it may not be true in most cases.... but I have 2 friends with epilepsy..... and of the two of them.... 2d games they can play without having an episode (for a while mind you.... after too long its inevitable) but when it comes to 3d.... something about the transition and flash of it causes episodes..... so I think that even with the masses of people like myself whom adore both 2d and 3d games..... 2d will remain as much if not close to as important as 3d.... I could be wrong.... but thats simply my opinion.... good topic by the wayhecatomb