If they packed in Wii sports, the PS3 customers would probably be really upset that Sony put in such a crappy looking game after all the "most advanced gaming experience" marketing and commercials. Besides, Wii Sports and the Wii wouldn't have been such a huge success if it were $399.99.
Anyways, the game SHOULD be GT5:P. It needs to be something that's rated E and has good graphics to show off the system specs.
@ssj12: would be better if they'd just pre install HOME or in-game XMB.