I heard that PSP is also compatible with xbox 360, but I'm still getting PS3, it will be worth it just for the Blu-ray aspect. Sony announced that they will release a stand alone Blu-ray player and it will cost around $500 so people will opt for the PS3 for sure...

Blu-ray will prob have dvd box sets on 1 disc, imagine family guy whole seasons
one 1 disc, awesome