Slightly relevant, but didn't want to make a new thread for it:
343 Industried has started that Halo 4 will deliver the "best looking game" ever on the Xbox360.
Corrinne Yu, the principal engine programmer of Halo 4 and its successors within the new trilogy, said on Twitter when a user asked will the forthcoming shooter be the best looking game on Microsoft's console:
"It's the best looking game on Xbox and any other consoles we ever made and we're all from AAA studios.So proud of team."
Yu also said:
"We are super glad. We all can't wait to share with you what we are crunching so hard on. #halo4"
Furthermore, she carried on to say:
"We really enjoy working on #HALO4.Time flies when coding work is so much fun.Even more fun when we're done".
Halo 4 is due for a release sometime during fall, 2012.
Source: https://twitter.com/#!/Corrinne