If it walks like a duck, quacks like a duck...then it's a duck.
If it is literally based around GTS, was more or less created as a way to bring fans who were rightfully pissed off at how online focused GTS was, and most of its car list and track list is based around GTS...then it's more then likely a Spec 2.0 update masquerading as a full price sequel. And that's really all that GT7 has been shown as, and with a month left to go before release with no delay in sight, why bother by this point?
This is basically the crux of every argument about the 'past, present, and future' PR speak if we truly take it at face value instead of just dismissing it as that. The fact of the matter is that GT4 is almost old enough to buy liquor and cigarettes in most provinces in Canada. The fact that its gameplay loop still the fulcrum design of most of GT's single player content since then has left GT as a franchise in a weird sort of stasis where there isn't really any sort of meaningful pushing forward of gameplay loops where most other racing games, especially within its competition, have experimented and tried different things. At what point does Polyphony cut the cord and try something new? If I wanted to play GT4, I'd play it on my PS2. If I wanted an uprezzed 4K version of the game, by this point PCSX2 is available and able to be done since the actual feasibility of a remade or remastered game in GT4's scope and scale is nil because of the licenses involved.
That's all that this really is. It's spinning in circles all because Polyphony is too scared (or more accurately, too ignorant to see how the racing game genre has shifted outside of it's insulated and insular bubble) to try anything new, and they realize that effectively selling the same game for 17 years, and playing on people's nostalgia is enough to sucker a fair few people into buying in, every time. I'm certainly not interested in that anymore, especially when other options are available both on PC and on console. Even then, Polyphony seem ignorant to ever doing anything actually new that isn't just forcing something onto the player base because it fulfilled a wish that Kaz had in a keynote speech two generations of consoles ago.
I'd certainly like Polyphony to change things, and hell, maybe GT7 is good and actually manages to make me not feel like some jaded asshole. But from what I am seeing now, with one month to go? I see basically no real, meaningful changes to the mold that GT desperately needs, and until those changes are made then the series is in that weird stasis where it's a seller, but the actual player base of the game is small because most people who actually play racing games more or less see right through the game in the first few hours.