Please no.
This gen only hit its stride last year....there is still a lot that can be done by the current machines. PS5 in 2018, or even in 2019, would feel forced, and not natural. Let the tech cook up a little bit, Sony. Release PS5 no earlier than fall 2020.
Bet with Intrinsic:
The Switch will outsell 3DS (based on VGchartz numbers), according to me, while Intrinsic thinks the opposite will hold true. One month avatar control for the loser's avatar.