-Something like an R9 770X or whatever would be like 8 times stronger than the 7870 in the PS4
-16 or 32GB of HBM memory bringing the bandwidth to 1 or 2 TB/s
-An 8-core CPU clocked at 3 - 4.0 GHz with much better IPC than the PS4's cpu, and a second quad-core cpu for background tasks.
-Full backwords compatibility with the PS4.
-Expect the PS5 to perform as well at 4K as the PS4 does at 1080p now with the obvious advantage of much better effects/AI/Physics. 60 FPS should also be at least decently easier for the PS5 to do than it is for the current consoles (Due to the faster CPU and RAM).
-Possibly a 1 TB SSD for fast load times. Expect at least a hybrid solution.
Lol. Current gen barely gets 1080p. 1440p will be max.