I'll be surprised if GT4 comes with 1000 cars. My guess is that it'll have a couple hundred like usual and then you will be able to download more off the internet.
I'll also have to disagree with GT being the ultimate driving game. Anyone ever play F355 Challenge? Not that is a challenging game.
A few gripes with GT3 are:
6 car fields
Stupid AI
Being able to bounce off of walls in a corner and not slow down
Driving off road and not slowing down
many others, overall it's a decent game but not the best
__________________
|