First and foremost...Price, then the popularity of XBOX 360 as PS games are now available on XBOX. The Wii. And Blu-Ray hasn't taken off yet, it's doing well but not that many people have 1080p TV's. When more 1080p's are prevalent and people find out stand alone Blu-Ray players cost a grip, the PS3 will start sellin. By that time, PS3 will have more games available. PS3 60g is equivalent to a 360 with a Hi-Def player.