Rocket League will be getting an update next week that should make PS4 Pro players happy. Full 4K resolution support is coming with 60 FPS on all maps in one- and two-player split-screen modes.
The update, which is scheduled to come out on February 21 along with the Hot Wheels DLC, will also support 60 FPS in three- and four-player modes as well, but Psyonix inferred that a few arenas may run slower than that depending on circumstances. Developer Panic Button assisted Psyonix with the update and PS4 Pro compatibility.
Other changes coming in the patch:
- A new fan-voted “Player’s Choice” Crate filled with some of the community’s favorite items.
- PS4-specific technical improvements.
- Multiple performance optimizations and bug fixes.
Psyonix did not specify what the technical improvements were or if the bug fixes would also be applied to Xbox One or PC, so I guess we will need to wait for the full patch notes next week.