Meh, Call of duty been pretty much the same ever since MW, Just some different maps, guns and chars. Ain't gonna get it, I find it way too unrealistic.
Yea, things have been similar, but I guess there is not much more that they can do based on the same theme (unless they come up with a way to release some form of virtual gaming). But the graphics have always been going up, and the gameplay is usually a lot better (if not, the multiplayer/online feature).
It can be pretty unrealistic though; at times in Modern Warfare II, I remember just standing there trying to kill someone, and even after what seemed like 100 shots, I couldn't get them.