Games worth playing, backwards compatibility that didn't suck
That's the same thing twice, because there were certainly no must-have PS2 games for an absolute age. The PS2 had one of the most underwhelming launches in living memory and its initial success came directly from its prowess as a DVD player. Which suggests that the vital question this time around might well be "Is Blue-Ray going to act as a similar crutch for the PS3?"
Doubt it.