@Johnnypenso @Imari @SlipZtrEm
The GT formula is the sum of all the intangibles - the way PD presents GT. The way the menus make you feel like your in a lounge, the smooth jazz music, the way they present the cars in the dealerships/garage, the the photo mode, the perfect replay angles, the breathtaking graphics, even the license tests.
They are always praised for their attention to detail, and they take all aspects of the game equally serious. I mean, this game has custom interiors/wheels depending on the exterior paint colors. Everything they do is so Gran Turismo, as weird as that sounds.
It's the sum of everything they've done over the years and the experience doing them - the GT Academy, the Vision GT, the failed launch of the Citroen GT, being 4 console generations deep, Kaz's racing experience, having a hand in the design of the GR. The entire series' history shows in each title, especially what I've seen from GTS.
The GT formula is a means of style/execution. A certain intangible
flavor that is very unique to this series. One can say it's just a name, but that does not do the intangibles its due justice.
Take the below video for instance - if you were to remove all of the GT logos, a racing game buff could easily be able to tell its a GT game (even those that are just huge gamers without having a focus on racing games):
Regarding the offliine game progression, PD never said there would be, but they never said there wouldn't be, so anyone who does or doesn't think it'll be in the game is reaching no farther than the other. We just need more information - but it seems to be generally accepted that it won't be despite any confirmation.
The gap continues to close with the tangibles (physics, sounds based on the beta footage) and the car list will continue to grow (Forza had to face the big chop as well with XB1 debut) - but the intangible GT formula can't be easily emulated.
It'd liken it to the uniqueness of Quentin Tarantino films - very distinct flavor that is all but impossible to copy.