A great game trailer

I just watched the trailer for a new game called Halo 3 (found here). What I found interesting in this movie clip was that it's made using both real and virtual (3D) actors and scenes. Well, it's nothing new on the screen indeed. I mean we've seen so many movies that used 3D animation to create scenes that could hardly be realized using real objects. I guess I'm just impressed by their great work :o