Mechanics stay the same, guns may have different skins/models, but the recoil patterns, and fire patterns generally stay the same, and will turn into, use this one with this, and that's all you need. Just like every other COD. MW2 was the same as MW3. Except they made it even more, and unnecessarily chaotic.
No, it will not be much different, they will try to ride the success of their repetitive zombie side game, with a patchy, un-creative, railed, main game/multiplayer.
People will easily be able to control the technology. These games are pretty simple.