It's been a few years since I last went to the Nurburgring and drove their myself, but I still distinctly remembered how much more impressive the tracks many strong elevation changes look in real-life versus on screen, thanks to real life being in perfect 3D and on screen being a rather flat affair in comparison.
Today I've been there again with my father for his 60th birthday, and we did four laps total, and again this difference stood out in a major way. It really is the biggest component yet missing from the simulation (it's interesting to note that I made my father practice the Ring on both GT4 and Forza 3 first)
, with the only remaining thing being the two or three sections of the track where you go from diving down quickly into a steep climb and you feel like you're being crushed into the ground and unable to breathe because of the G-forces! And we drove a 59HP Fiat Panda from 2005 (weighs 835kg, plus of course the 160kg that we weigh between us), imagine what that's like in a fast car.
But it only really comes into play in a few places, and it will be a difficult thing to simulate aff mordably. Other than that though - fantastic experience. And I'm now starting to get really excited about getting to play GT5 in 3D in the not-too-distant future!