I agree that MGS4 looks amazing, but remember..

- Konami and Kojima are making it, they produce some of the best looking games.
- MGS4 was not yet currently running on actual PS3 hardware.
- Also, MGS4 is not going to be coming out for a good 2 years probably. By that time, I assume developer's will have a good grip on 360's hardware, and will be able to push some solid visuals.