I was looking at a PS3 the other day... and I don't think I'll buy it til GT5 comes out. I'm not much of a movie guy lately... so the high def thing isn't pounding my mind just yet.
About Assassin's Creed, one review stated its a 10 hour challenge, or up to 20 hours if you do all the side quests. Its unfortunate that games these days are so short... I'm still thinking about it, but I don't see much replay value in the game
