I would have to disagree with most peoples complaints about the suzuka track on gt5p demo...... i have gt4 running on av1 component (1080i upscaled) and gt5p running on hdmi... all through a pana 50inch plasma..... i would have to say that it is not only a HD version of the gt4 track!!! there is far more detail on the track....
I guess I could have put it better than to say the Prologue Suzuka was "spruced up."
I agree, there is much more detail on the track, and I do think it's dandy. Having seen some footage, the real track does look more like it does in Forza 2 in spots, but it's nothing to complain about, and of course that was with the demo. And with the pics that D Nitrate and others have posted, I'm confident that Kaz and the lads are going to give us tracks that make us feel we're there.
As for the darkness issue, HDTVs are just something you'll have to play with. When I got my Bravia the day after Thanksgiving, it was on the Vivid preset which exaggerated everything, and EVERYTHING was overly contrasted. I finally opened the manual and waded through the extensive parameter list, and fudged something that looks really wonderful with TV or gaming either one. Prior to that, the shadows in the Prologue demo swallowed everything in inky black. But now, it's much more realistic.
Those of us with HDTVs are just going to have to crack open that manual and start fussing with the settings. Keep track of what you're doing carefully or it can get rather washed out, and watch carefully to see where you're taking things too far.
Oh, and there's another thing. On my Bravia, possibly because LCD TVs have a contrast ratio of 18,000 or less, the PS3 looks best when the Display Dynamic Range is set to Limited, which I believe is the default. I tried Full but the shadows just went back to ink pools.