I don't understand much about pc gaming, but it looks like there are "generations" of games that are started with a specific game. I remember people had similar reaction when they first heard the minimum specs for Doom 3 as people did for Crysis, because it was something so far from the reality of the majority of the gamers. I remember that in 2007 2gb ram was considered more than enough for everything, and than Crysis comes out and asks 1..0gb as minimum.