So PS4 Pro will make games look better even on 1080p screens, but..

[Qwark]

Rise of the tomb raider has an enhanced mode in 1080p/30fps on PS4 pro a mode with an unlocked framerate with the same graphics as the regular PS4. So even if you don´t have a 4k tv the pro will enhance your 1080p picture. Beisdes rendering a higher piture than neccesary causes supersampling which improves picture quality.