EDIT: From Kotaku:
The game's look was the most stunning thing about it. Much like Resistance Fall of Man, it wasn't anyone thing that really stood out (though the lighting effects were just plain stunning) but rather the combination of everything you were seeing. There was so much detail, so much activity that it was hard for you to take it all in as it happened. Instead the game's intense action and detailed graphics helped to create what the developers called a violent theater of war.
There it is, the first ever gameplay footage. O___O
EDIT2: From the trailer: