I'm an old videogamer and in my opinion the killer application fon any hardware platform is a flight simulation. It's all about the massive scale in which the the game take place, about the sense of speed, about the texture and the density of the objects on the ground etc... if anyone has got ACE COMBAT 6 you know what I mean. The game looks gorgeous but when you fly 100 ft above the terrain you can see the limit.

I don't know if Namco push 360 to the edge. But I'm pretty sure that we've to wait another generation of hardware for a photorealistic flight near the ground.