Hmmm... Now it gets more interesting. Considering these are GT4 models, upscaled to GT5 res, that we are talking about. It does look quite harsh. Perhaps on normal view it is rather negligible compared when zoomed in.
Now I feel like all these Standard cars are just "padding" or fillers in the game. On the other hand, it is still good that we can still drive these rather than just 200 Premium cars. Although, yeah, what it looks like right now is that PD made those Standard cars "as is" with (more or less) no extra handling (treatment) whatsoever. Jaggies and low res galore.
Apparently and sadly so.
But they made it up to us, emphasizing the "filler" aspect as you put it, by not having any wheels for these
800 cars in the game.

Personally, I consider this, adding insult to injury and extremely dissapointing.
Sadly again the game has
never been about anything but "200 realistic looking" cars, and I must admit they certainly are.
However it is almost impossible to see this installment of GT, (IMO) as nothing more than a "filler" version of GT6.
All things considered, I have to question the cost of this strategy, as too high and ultimately, a Big Blackeye on this installment.
Possibly, as has been brought up in this thread, this situation was unavoidable due to the Gen jump and accompanied tech. issues, resulting manpower requirements, etc., etc., etc.
If so, I wander at this point, if the "just give us the 200 premiums crowd" has been right, all along.
Sorry but there is no way I can reconcile waiting almost 6yrs, for 800 GT4 cars that don't even carry over the wheel change feature.