Many of you guys are saying that only the physics are important, nothing else matters. Fine. Other aspects of the game can be ignored because hey, Gran Turismo is the real driving simulator. Why not just recycle the graphics, artwork, sound clips, music, and menu interface from the first GT and use them in GT5? Give it the production values of a PS1 game from 1998. Nobody will care as long as the physics are realistic.
Look, I'm not saying that trees are an important part of any game. But you can't just use the age-old excuse of "anything outside of driving doesn't matter in a driving game." Every minute detail is part of the experience. If you want to create a realistic world, then each constituent part of that world must be realistic as well. Yes, nobody playing GT5 who isn't bored or lazy just spends their time staring at trees. But if they were poorly rendered or generally looked like crap, I guarantee the majority of you would notice.
I'm also not saying that GT5's trees look bad either. And I would much rather PD spend their time working on the physics, adding cars, tracks, night racing, damage, a deep career mode, and a larger field to race against. It just really gets me ticked off when I hear people say that the racing is the only thing that matters in a racing game. One of the reasons I play more Gran Turismo than any other driving sim is because of its presentation.