When you think of the graphical power of the Xbox vs. PS2, there is really no contest. I felt that the Xbox driving games still couldn't compete with GT3, though. That was until I tried out Forza.
The online play is going to be better than Project Gotham 2 and the tracks and cars have much better physics and modeling. Plus, it'll have something that PS2 won't - Ferrari's!!! Like GT3, you will be able to "tune" your car as well as create custom graphics. Online play will also enable car trading back and forth as well as damage. The demo I had included Laguna Seca - a track that I've turned well over 800 laps in real life. It's the first game to get turn 6 right!!! All other games totally missed the essence of that turn.
I'm still going to buy GT4...I'm a car geek and I wouldn't be complete without it. But I think I'll be sinking most of my free time into Forza.
If you find yourself alone, riding in green fields with the sun on your face, do not be troubled; for you are in Elysium, and you're already dead!