If it looks/plays half as good as this then it's a COD4 beater, and that's not easy!
Some gameplay mixed with cut-scenes, looks similar to COD4 (for obvious reasons) but it looks like we're in for some major action!
http://www.destructoid.com/finally-t...3313.phtml#ext
Some gametrailers videos - http://www.gametrailers.com/game/modern-warfare-2/11043
E3 gameplay footage