Seriously, anyone that thinks a launch XBOX game looks as good as the current ones should just stop gaming (or being a fanboy). No way in hell would we see a game like SC: Chaos Theory during the systems launch. Name one XBOX game from launch that looks as good. Same with PS2. Name a PS2 game from launch that looks as good or better than MGS3. That scene in the field when you're fighting The Boss, come on.
And stop with the "Next Gen" animation crap. Animation is DEVELOPMENT, not SYSTEM POWER. Shadow of the Colossus = PS2, great animation. Fight Night 3 DEMO at E3 was a cutscene ala MGS. It was real time but they motion captured the whole thing. That is why the animation looked like that. He did NOT play it in real time, he moved the camera around the models in realtime. If you think the PS3 one is gonna have "superior" animation then you are sorely mistaken. He said the PS3 one is going to be a newer version, like part 4 since it's coming later (you know, attract people to it again if they played the 360 one). Will it be better than the 360 one, maybe, but lets' wait and see.
But again, animation is a development issue. Doing transitional animation for a boxing game must be hard so I don't see EA going balls out on it. Can you imagine? From left hook to block we use this set, from right cross to sway we use this....Blah. Put in some crap canned shit and move on is what it looks like their saying.
The extra power from both systems will help animation to a degree, but it comes down to the developers. Not an extra SPE...