Anything released before PS5 should be a PS4 game with later ports/ remasters/ BC. Anything released after should be PS5 only.
I think everything left announced should be ps4 but anything new like horizon 2 should be ps5, unless they announce it for 2019 (I'm assuming ps5 is 2020).
I think everything left announced should be ps4 but anything new like horizon 2 should be ps5, unless they announce it for 2019 (I'm assuming ps5 is 2020).