Metal Gear Squalid

Gametrailers has some footage (found via Joystiq) of a new Metal Gear Solid 4 trailer. Joystiq seems rather excited by it, but I'm not sure why. Yes, it's pretty- very, very pretty. But we knew that already. Where's the gameplay? Is it going to play exactly the same as the past three iterations of the series? If that's the case, it just goes to prove Nintendo's point: there's nothing new in gameplay, and all developers seem to know how to do is make us play the same games over and over- just with nicer graphics. Come on Kojima, prove me wrong.