At this point of time, the games are already looking good enough. Sadly, they all lack in game play variety and AI. Would a difference in API address that? I guess not. IMHO, the game devs should work more on the story execution and gameplay mechanics, rather than worrying about putting more impressive graphics. It'd really be sad if the games end up like the effects overloaded movie Avatar, shiny on the outside, fluffy on the inside.