So
@avens TWO GT games don't do consistent 60 so no GT game is going to make consistant 60 then? Newsflash buddy. PlayStation VR requires 60 minimum. They don't have a choice in the matter. Whatever has to be sacrificed will be sacrificed.
It was the PS3 that was the limiting factor last gen. Blame PD for overreach yes, but to suggest they'll just do the same again is pure guesswork
First, about your "TWO games" argument.
1.- GT5 Prologue wasn't consistent neither.
2- More importantly, presenting it with those words is twisting the facts, which is that it has been a whole decade with severely inconsistent framerates in the home console versions of Gran Turismo.
Those "two games" (actually three) span more time than GT1 through 4, and recent history matters way more than those.
3.- Only GT3 and GT4 are the main releases of Gran Turismo which main mode's ran at 60 FPS. That's "TWO games" too, just that your examples are over a decade old.
4.- And just so you know, GT3 and GT4 didn't run at steady 60 FPS either. Sadly I couldn't find actual testing done, but here on GTP people have reported GT4 not being consistent, and I remember GT3 had noticeable drops under heavy loads. Therefore your "TWO games" argument has no grounds to begin with, as no GT home console game has ever ran at steady 60 FPS (besides the hidden hi-fi mode).
Second, any developer can make their games run at 60 FPS in whatever console. The PS3 has games running at steady 60 FPS too, as does any other console ever released, including the weaker ones of the current generation: the Wii U and the Xbox One.
The thing is PD has chosen for the past 11 years to go for absolute visual quality, with the tradeoff of their games going into 20 FPS territory, as testing from Digital Foundry shows.
All the main titles of the Wii U run at steady 60 FPS, despite the so called very weak hardware. On the Xbox One if Turn 10 had decided to run their games alike PD's (with "60 FPS" but with dips all over the place) then Forza 6 would have looked much much better than what it does, but the developer chose not to.
Third, Playstation VR is irrelevant to the discussion, because:
1.- Developers can make their games have a "VR mode", which simply is that the graphics quality is lowered with that specific setting for the sake of having steady 60 FPS. Games on consoles do not always run with the same settings, which means that yes PD has a choice.
Take the said "hi-fi" mode from previous GT games for example (PS1), or GT4's 1080i mode (PS2), or GT5 and GT6's photomodes (PS3) that ran at much higher settings than when racing, or that in Rocket League (PS4) players can tweak specific graphics settings, alike PCs.
2.- For PlayStation VR it is recommended to get a separate console, the so called "PS4K", which has a GPU twice more powerful. That means it would be like comparing apples (PS4) and oranges (twice the power).
If GT Sport 1.00 runs at perfectly steady 60 FPS (alike Forza 6. Not 55 ish, not 25; 60) that would change my opinion about PD actually attempting to achieve steady 60 FPS. But until then we have to stick to the facts, which is the recent history and that is that their games rarely to never run at 60, and have huge dips that go below 30 FPS. That gives us a basis to at least speculate their newest one won't either.
Anyway, the demo/beta should be out very soon (maybe the Facebook manager knows when). Then Digital Foundry will test the framerate, we'll see the results and interpret what PD actually goes for.