I tried to play Halo CE this morning. I can't do it. The game gets up to > 120FPS fine, but the animations are locked to 30FPS and it looks loving painful. Same goes for Halo 2 Vista's cinnematics (gameplay is V-Sync'd to 60 though).
Keep in mind, until 6 or so months ago, the only games I ever experienced in 60FPS were the Ratchet & Clank games. Everything else I played was 30 and under. The difference has been staggering and I refuse to go back.