At 1680 x 1050 and 1920 x 1200 the GeForce GTX 280 is not much faster than a GeForce 9800 GX2 but when you crank up the resolution to 2560 x 1600 on a 30" LCD display you really see the raw performance this beast has to offer.
Here's a quick overview of how much better the GeForce GTX 280 is in 2560 x 1600 in various games:
This is just a short wrapup, for the full review and test notes you have to head over here.
Enemy Territory: Quake Wars (High Quality): 28.8% Crysis (High Quality): 709% Crysis (Very High Quality): 820% (but still unplayable!) World in Conflict (High Quality): 51.85% World in Conflict (Very High Quality): 270% UT3 (DM_Shangrila Flyby | 4x AA, 16x AF | Level 5): 75.3%