X2 Rolling Demo
This demo, which includes a benchmark mode, gives you a pretty good feel for what Egosoft's next game "X2 - The Threat" will look like. Although the engine doesn't use any pixel shaders, the graphics are nonetheless impressive. Egosoft makes heavy use of stencil shadows and Dot3 bump mapping with high-res textures. More information on the demo is available here .
NVIDIA cards clearly have the upper hand in the X2 demo.