Regarding this discussion about whether GT8 will be cross-gen with the PS6 and when it will be released, my guess is that it will be a PS5 game, it will be announced at the next big PlayStation event, probably between August and November of this year, to be released between March and December of 2026.
The PS6 should only arrive between November of 2027 or the first quarter of 2028.
PD is usually a showcase studio for SIE regarding the extensive use of the particularities of each new PS, it did not have much time to customize the engine for GT7, which should use the brute force of the PS5 to deliver what in practice is a PS4 GT7 in 4K, with better resolution, LoD and textures.
With the PS5, the engine should be improved to use HW functions of the new architecture, improving streaming and scaling of computational data, with efficient code that doesn't have to be executed almost by force.
This is a hard, and sometimes requires rethinking a lot of things, but I believe it will be easier than it was in the PS3>PS4 transition.
Much of what we have today can be improved just by editing things like scenery assets, perimeter geometry and especially vegetation, which is the part that I believe (and hope) will benefit the most. The cars themselves can receive improvements in LoD, material shaders and reflections, and I believe that the lighting will be the same as GT7 in the worst case scenario, which is not a problem.
But I believe that the biggest challenge and problem that the studio faces is not technical or competence-related, it is content production, which with a small team that prefers to produce alone, controlling every small aspect of quality, without external help, limits the scope and distance that the series could and deserves to achieve and although I believe that Yamauchi is one of those responsible for this dilemma of having a lean team that he can control better, I believe that the main force responsible is SIE, which should assert itself more and perhaps offer more financial and project management support.