I'll admit, until recently Call of Duty have held their own on the graphical side, but they've always had that same technique that Bethesda use (I can't really think of who else does) where everything is just 2D images that look 3D. I think they should really overhaul the entire engine graphically and bring it more up to Battlefield's engine Frostbite, I don't think even CoD can get away with looking outdated in the future, Bungie did it with Halo! Reach was a fantastic looking game!
Wow, that's actually really impressive a Mac can do that, they've never really been known for their gaming power. I knew some people in college who bought Macbook Pro's for £1,000. Which is a lot but for a laptop to run CoD @100+fps at that resolution, it must have cost a lot more?
Sorry, I know even less about Mac's than most things.