Just read a Eurogamer article on the subject
http://www.eurogamer.net/articles/digitalfoundry-2017-why-cant-destiny-run-at-60fps-on-ps4-pro
On the face of it, there's nothing here that we couldn't have guessed already (no 60 fps): when you look at the balance of the PS4 Pro and indeed Project Scorpio, both consoles have been specifically designed to run current-gen game engines at higher resolutions and smoother frame-rates. Both Scorpio and PS4 Pro only offer a 31 per cent uplift in CPU power, while GPU sees a 2.3x boost over base hardware with PS4 Pro, rising to a 4.6x uplift on Scorpio vs Xbox One. The core hardware design of both machines is all about scaling up graphics, not the game simulation.
one thing is certain - it would probably cause more problems than it is worth. For a start, operating at 60fps on Pro while base hardware remains at 30fps would give Pro players a big, big advantage. The only way to maintain parity between players would be individual servers for base and Pro owners.
Based on basic logistics, carving up a console audience in this way, or bestowing one set of players with a huge advantage is highly unlikely to happen - something Microsoft's Shannon Loftis pointed out, saying that although developers have the choice, "as a developer I would bet no-one chooses different frame-rates for MP games ever."
If the engine was built with 60fps in mind (not ioptimized to run at 30 on console) then it's possible to have 30 vs 60 in offline modes. Otherwise it seems very unlikely.
