from what I have seen so far, for the most part same old GT with some improvements here and there. Cars look great like always, menus look nice, hud looks interesting (however hope we can turn some info off).
I think that I will still spend a fair amount of time with casual racing when the game is finally released. No damage and no mechanical damage most likely even when the full game comes out will keep GT series below the bar these days. It all depends on what you are looking for though. Really Really like a lot of things about project cars. However will admit that it takes a lot of time to learn the cars, tracks etc. I will admit that only run at 65% difficulty with most aids on real. It hard to find the time to really get the most out of it. Mini series would be great, however guess will be easy to do that online in PC2.
Regardless wish the best for the GT series.
Should be fun if nothing else at least for the first few months.