Well, when you are modeling a real-life track....
And on original tracks, so we really want Pole Position style back grounds with a generic building a blue sky? It is a distraction.
Besides, proper backgrounds add depth to the track and tricks the eye into see a two dimensional image as three dimensional. It is vital.
No, but for a game that is supposed to be simulating driving the cars it is a very relevant feature.
Me. I have always used the rear view mirrors when provided in GT games. It make sit easy to check cars behind you without losing sight of the next approaching turn.
Not really. They all have their points and add something to the game more than having tire marks. Granted, tire marks would add to the realism and be a nice feature. As it is now they have the nearly permanent marks left from previous races and so the visual effect is there when racing without seeing someone leave new marks. In all honesty you won't notice that much until replays. Skid marks are something that I never think about until someone else brings it up.
Either you are under the impression that the PS3 is supposed to be some uber computer or think that skid marks are extremely simple. Considering everything that PD manages to add to the game that adds to the realism and does have an effect on the game for the player. Skid marks would not be something that is necessary to pull me into the game.
Now if they did do skid marks and rubber on the track that added some grip in the racing line while leaving marbles off the line that would be an incredible feat and I welcome it. But I think that in the grand scheme of things skid marks are just a small thing that would have the most effect in the replay. Things such as damage are much more important for me.