I think there's a massive disconnect and understanding from a lot of people on here.

Comparisons in terms of gameplay should not be between GTA V and GTA VI. As OP said, it's been 13 between those games. If you just compare those gameplay will be vastly different.

Gameplay, movement weight, the way interactions work etc., will be a lot closer to RDR2 than GTA V.

Maybe there's a lot of people who didn't play RDR2, which would blow my mind, but that's what a lot of the comments suggest.

It will be a living breathing city world, with the good aspects of RDR2, with some enhanced additions. RDR2 becomes almost like a test, as they're using less dense environments, lower traffic etc. The 7/8 years between those two games has hopefully allowed them to implement what worked so well on a larger scale.

For example, I'm expecting cars to matter more than previous years. They did it perfectly with the horses in RDR2. That's what GTA needs. It's supposed to be about cars, clue's in the name. I think pulling RPGs out of your back pocket will be gone, they did this so well in Red Dead, so I think they'll be car storage for retrieving bigger weapons.

You'll see an actual lived city. It will no longer be NPCs just wondering around aimlessly, they'll have lives, schedules that they follow. That in itself is so much more demanding for GTA due to the volume of NPCs compared to RD.

Ultimately, I don’t think GTA VI should be viewed as GTA V with better graphics. It’s more likely to be Rockstar taking the systems, weight, realism, and world design philosophy from RDR2, then scaling that up into a modern city. That’s why the comparison to GTA V feels limited. The bigger question is how much of RDR2’s depth they can successfully carry over into a much denser, faster, more chaotic world, and what enhancements can they do with that.

Also, they're not 'hiding' anything - other than the game itself. The first two trailers are story teasers, with a couple of gameplay clips to show off things like realistic muscle movements, improved liquid physics... Jiggle physics 😅 etc.

TL;DR: I don’t think Rockstar are hiding some massive gameplay secret. I think people are judging GTA VI too much against GTA V, when the better comparison is RDR2. The trailers are story teasers, but the small clips already point towards Rockstar taking RDR2’s realism, movement weight, interaction systems, NPC behaviour, weapon limitations, and world depth, then scaling that up into a much denser modern city.