I think it would add a great level of detail to have things such as the aircraft guns shooting down planes in the background. In the map Shoreleave, I love how some of the ammo crates come from supply drops and how the tank shoots a hole in a wall once it reaches a checkpoint to allow players to different areas of the map.
I am really excited and I hope the makers of this update will add more of these little details and help TF2 recover from the mess that was the "Meet your Match" update.