The PSP game should give a good idea of how many cars are gonna be in GT5. Think about it, GT5 has been in production for ages in one form or another. GT PSP has not. It was being developed early on in the life of the PSP but quickly put on the shelf until a short time ago. How did they get so many cars in the game? Simple; they took all of the car capture data they had for GT5 and quickly developed PSP models. Expect GT5 to have just about every car from the PSP version.
My Top 5:
Shadow of the Colossus, Metal Gear Solid 3, Shenmue, Skies of Arcadia, Chrono Trigger
My 2 nex-gen systems: PS3 and Wii
Prediction Aug '08: We see the PSP2 released fall '09. Graphically, it's basically the same as the current system. UMD drive ditched and replaced by 4-8gb on board flash memory. Other upgrades: 2nd analog nub, touchscreen, blutooth, motion sensor. Design: Flip-style or slider. Size: Think Iphone. Cost: $199. Will be profitable on day 1.