http://xbox.ign.com/articles/402/402123p1.html
If you can spare $6, I HIGHLY, HIGHLY, HIGHLY, HIGHLY suggest you hook up for a month of Insider and get the full 8 minute trailer. After 3 of the 5 teaser clips, I was already fishing out my credit card.
Words just can't describe the goodness that this is.. from the graphics to gameplay, "damn!"
And despite it being a video, there was no chugging to be seen.. which is good, since I think a lot of us were expecting slowdown to come hand in hand with the fresh new look.
But yea, heh, WOW. How'd you like that Ghost commandeering GTA style?