I have not seen anything in what is to be GTS, make me think this is freaking awesome.
I think a lot about this. Take a step back and consider all of the stuff that blew you away in the past - new and unusual cars, content. Video games were a lot simpler then. It didn't take all that much to impress. I think the racing genre has tapped out the whole "wow, content!" segment of our brains. PD could go NUTS adding more tracks and cars to GT Sport than even the most demanding fan would expect and it wouldn't guarantee them anything like the runaway success of their heyday.
I've seen other people note this, but by nature all of the different "racing sims" are converging on the same things. Physics, graphics, gameplay.. even content. Once you're behind the wheel, there aren't too many ways to differentiate without getting away from the ultimate realism goal. Outside of racing, there's only so much joy to be had doing non-racing things. So nobody runs away with the crown. What's the next-level "WOW"
killer app thing for the racing genre? Please excuse the lame buzzwords. PD thinks it's getting everyone online. I would point to Horizon's success. Though that might as well be a different genre, I think it's a good hint into the masses' general interest in racing.
Most of the big leaps forward for GTS (God willing they make the leaps) will be catching up to their competitors. Online is where they're banking on the next big thing to be. Considering the delay, they may have reconsidered that to a degree. But I'm sure it will remain their killer app plan. A big part of GT's past appeal was how overwhelming it all was - in a good way. GT5 and 6 carried on that tradition objectively well yet the effects kept diminishing. Typical racers probably see the "online" icons as more intimidating than joyously overwhelming. If PD can flip that around and bring social online racing into the mainstream like they're envisioning they could be in a good place.
I feel like in the end, too few people actually care about racing competitively, the glory of victory, the camaraderie and fun that comes with the online racing experience - even at its best - for that to elevate GTS much above their sim competitors. Assuming they can catch up where they're lacking (sound, AI, customization, SOUND, SOOOOOOOUNNNNDDD) and keep the traditional GT experience torch burning I think the best they can hope for is earning their longtime fans full respect and to be generally considered "the best" on console. They'll never be the universal king of the mountain again.