I'm very happy with my 65" Sony 900E. It was between that and the 55" OLED C7. I'm glad I went for the bigger size instead of the deepest blacks. Black level on the Sony is perfectly fine and the only times you notice the effect of local dimming instead of per pixel like on OLED is during end titles or a logo somewhere on a further black screen.
Normal PS4 looks great on it already and should allow HDR as well which is the biggest difference. Pro makes everything sharper. To what that effects you depends on how far you sit from the tv. When I play GT Sport on that I put my chair 5ft in front of the 65" to see all the details.
Anyway that tv looks awesome from SNES mini to PS4 Pro with HDR. Blu-ray looks great as well, and I have no intention to pay extra for 4K UHD discs. Those I watch comfortably from the couch 12ft away so it wouldn't make much difference.