CrazyGPU on 10 February 2018
I would go for 2020. why?
1 - PS4 is selling even better than PS2 did.
2 - Software is doing great and has a pile of exclusives almost without competition.
3 - Switch is not diminishing PS4 sales much.
4 - AMD and Nvidia will have 7 nm products ready for 2019. So in 2020 process will be mature.
(AMD 7nm “Super Secret” Navi GPU Spotted In Driver, 2H 2018 Launch Expected.)
That translate in faster processors that consume less power.
5 - 4k TVs will have much larger installed base.
6 - a 2020 PS5 will be fast enough for 30 fps native 4k gaming at high quality graphics settings. (don´t tel me that PS4 pro or XBOX one X are real 4k native systems for every game. They are not.)
