It has been confirmed by Yamuchi today at a party held in Tokyo to celebrate the completion of GT4 that
GT5 will have a damage system.
Eye Toy will also be supported.
Source gamefront.de
Also,
The Limited Edition Nike GT4 package. Apparently if you wear the shirt with the Eyetoy pointed at you, you unlock a car for GT4 that was designed by Nike.
Gran Turismo stuff!
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