PC World tested the gaming performance of a new and old MacBook Pro with Boot Camp. They tested the MacBook Pro (July 2007) with 2.4GHz processor and 2GB RAM and compared it against the new MacBook Pro with 2.8GHz processor and 4GB RAM memory. The reporter installed Windows XP SP3 and Windows Vista SP1 on the two systems and ran several benchmarks. One of them was Crysis, at 1280 x 800 the MacBook Pro could crank out only 13FPS of this first person shooter. It's a big improvement over the old MacBook Pro but still unplayable.
Happy times, Crysis shows a similar performance bump, though viewed practically, those numbers might look a little depressing. Crysis arrived in November 2007, but I'm fairly certain I won't be comfortably running it on a MacBook Pro until somewhere north of 2010. Drop the settings to "medium," however, and I can vouch that the average frame rate on the November MacBook Pro rested comfortably in the very playable middle 20s. My problem: I'm a settings snob, and "medium" just ain't cutting it when you get a glimpse at "high" and realize what you're trading down to.