the PS4 Pro will probably improve frames rates in itself just like the X1 S improves framerate on certain games. There are many games at unlocked framerate or having options to unlock it making the games droping in the 40s like Killzone Shadowfall. This is where the Pro could give you 60fps.
I do think as times goes on you will see more games having 60fps options
My online systems: Mac M4 Apple sillicon+16 GB, PC Vega 56+Amd Ryzen+32GB DDR4, Xbox Series X, PS4 Pro, Switch Lite, Playstation Vita TV, PS3, PSP
My retro systems: Wii U, DSi, Xbox, PS2, Dreamcast, N64, PS1, Sega Saturn, Neo Geo AES, SNES, Evercade







