Still think it was a mistake to put this on PS3, Evolutio Studio's game should have been on PS3 and GT on PS4.
It's not a mistake. The PS3 has tens of millions of users, and a franchise like Gran Turismo is too big to become a launch title. It'll sell faster than PS4s will move off the shelves. This is the same reason why Rockstar chose to put GTA5 on the current gen. Massive franchises (potential 10 million and above sellers) can't be launch titles.