IMO the standard cars were never straight ported from GT4 anyway, they had their improvements when GT5 was made, they just weren't anywhere near as good as the premium models.
Personally I'd like Polyphony Digital to keep as many models as possible, just give them their improvements, bring them up to a better standard than on PS3, like they have done in GT6, those can't really be mistaken for even GT5 standard cars.
Obviously the best situation would be to update everything to a premium standard, but that's not always feasible and I think people need to be realistic about what's possible with the manpower at hand.
I wouldn't be shocked if they've been working to make updating everything as efficient a process as possible, without losing the quality, but provided the premium line-up is decent in volume and quality of cars available I don't mind PD keeping the standard cars, you don't have to use the ones you don't want to.
The Game Engine will be able to really stretch it's legs much more compared to the PS3 games, if PD just bumps the resolution up from the 1440X1080 in GT6 to 1920X1080, lock it to 60FPS they'll have a lot of extra performance to use on image quality so this should be one of those games that really shows off what PS4 can do.
Just implementing new shaders, upping the texture resolutions, tiling, increasing their adaptive tessellation to a dedicated hardware solution will show massive improvements in the visuals from GT6, so I'm not worried.
There's also things like cleaner AA, new particle and substance effects, as well as improved sound, physics and AI (Kaz has been speaking about that in interviews recently).
As I said IMO it's better to keep the library of cars they have, make as many improvements as they can to that library on the whole and also have a decent library of premium models, because it gives gamers a lot more options.
If they have a library of nearly 500 premium cars people can just ignore the 700-800 standard cars that they don't want to drive and there's still more hand made, highly detailed cars than pretty much any other console racer.
Hopefully GT7 does launch next year, I personally can't wait to see just how good this can be on PS4, hopefully we'll see it at Sony's Destination Playstation event in December this year.
