VVV: "Kaz discusses the advantages the PS4's extra processing power will provide for Polyphony:
“I still cannot go into detail, but developing on PS3 was hard: you don’t have enough memory to do all you want. Our goal was to always preserve the feel of Gran Turismo but with the latest installment we had to face limitations. With PS4 we have a lot of memory available: we’ll be able to exploit it easily, inserting elements that we had to force or withheld on PS3.
There will be better graphics, better physics engine, smarter AI and more online options.”