http://www.futuremark.com/products/3dmarkvantage/Only works on Vista and you have to enter a trial key every time if you don't purchase it.
The 1st graphical test is pretty disappointing. It runs at 10-15 fps much of the time even though the graphics don't look as good as, gasp, Uncharted.
It seems to be a highly CPU limited test. The water physics are impressive but are not worth the low performance.
I'm guessing Test 1 would run much better on a quad-core or when Nvidia releases its PhysX drivers.
After test 1, I was prepared to be disappointed but the graphics test 2 was amazing. It has the most amazing space sim graphics yet and it easily makes the PS3 & 360 look like the N64.
The trial-key process is a hassle but I highly recommend fellow Vista users to download this just to check out the space demo.