High dynamic range image-based lighting
The GeForce 6800 Ultra now supports the proper floating-point texture formats for my favorite DirectX 9 demo. Have a look at some screenshots to see how it looks.

Radeon 9800 XT

GeForce 6800 Ultra

GeForce FX 5950 Ultra

The banding is obvious on the GeForce FX, but the GeForce 6800 Ultra runs this demo like a champ, faster and I think perhaps with discernibly better output in some cases thanks to its FP32 pixel shaders.