I love how you say the 360 has "the clear advantage" in new IPs when 1. -they're new IPs, so they could flop like Lair, and 2. -you leave off a bunch of the ps3's new IPs, like White Knight Story and inFamous.
Edit: And unannounced games like Gears of War 2 and Forza 3 are as likely to come out in '08 as God of War 3. This list is extremely biased.