https://blog.eu.playstation.com/2017...21st-february/
Thanks to our development friends at Panic Button, Rocket League will soon officially support the PlayStation 4 Pro!

On 21st February, we will release a new update that allows Rocket League to run at both 1080p (on a standard PS4) and 4K (on PS4 Pro) at 60 frames per second in all arenas for single and two-player split-screen modes. Three and four-player split-screen modes will offer 60 frames per second in most arenas at the same resolutions.