Update:Here is a fantastic comparison shot from the beginning of the trailer with a picture that Jeff of Pixel Rally took when Transformers 3 was filming at the MPEA Busway in Chicago this summer. It shows what a great camera angle combined with color correction and CGI can produce.
Update 2: Here are 9 screenshots I gathered that show off moments on the Superbowl TV Spot. The first one is worth looking at just to see the destruction of the Chicago skyline with damaged, toppled and bent buildings. The next two show that Ironhide isn't colliding with one but both of the Suburban Dreads. The fourth shows more invasion destruction of Chicago. Fifth is a look at the worm thing. Sixth is Laserbeak complete with the homage to his G1 cassette look with turbines on his wings. The seventh pic shows Optimus Prime flying onto the scene (in front of Hotel 71) with Bumblebee and Ratchet on site. In the middle of that may be Soundwave but I think its just a drone that falls to Prime's blade in the next last two screenshots.