Team666
Hahahaha! You better believe that downloadable cars and tracks will NOT be a part of GT5! Sony ain´t stupid you know. What would be the meaning of doing that, when there will be no reason to release a GT6 or GT7?
I posted about this previously, suggesting that Sony/PD might or might not offer updates. I think they will, as someone above said, that the competition will include this capacity in their game, increasing its appeal and replay value. And Sony can go a few ways with this:
1. Download updates of cars, tracks and other features for free.
2. Download them for a fee.
3. Offer downloads as part of a package, such as an "update license" or something, covering a number of games for a fee.
I think Sony will be Sony, a Japanese Microsoft, and make us pay for it. And no matter how much it is, I'll undoubtedly go for it. Now this assumes that Gran Turismo 5 isn't a $60+ game. Sony may offer free updates to encourage people to buy it if it's expensive.
I also discussed the possibility that GT5 would be the last GT, and Sony would offer updates forever for it. But I don't think this will happen, primarily because of the advances that Sony, Polyphony and the development community will make in coming up with highly tuned development software and ability to use ever more of the PS3s immense power. Games will start off looking amazing, but with each game generation, developers will be able to get more out of the PS3 and the games will be even more astounding.
A GT6 will have a much more advanced game engine than GT5, and I don't believe that you will be able to patch 5 up to 6's standards. I'm sure that GT6 will have even more refined physics, better graphics, effects and immersive environments, and if there's a GT7, it will be better still. So offering updates for GT5 will be for the benefit of everyone, as Sony will reap the rewards of a happy racing community addicted to their prize franchise.