I was happy to see that a lot of the work on CE was put into enhancing the appearance of the environment. For me, it isn't necessarily about the armor. Take Reach, while the armor looked great, it was the drama that they incorporated into the surroundings that made me enjoy it most.
As for Halo 4: I understand that it was a CGI teaser trailer, and it was unbelievable, but it is going to a lot of explaining as to how the Chief's armor changed while he was in cryogenic stasis. But again, it was just a teaser. We'll know more this time next year.
I'm excited for both, so I know that it will definitely be 2 more titles to add to my Halo collection.
-Matt