Looking at this picture in particular, it appears that it may be providing a tiny bit of edge-anti aliasing. Look at the branches in the top left of the picture. Some of the stair-stepping of the aliasing looks reduced.
It may function similarly to the LG OLED's sharpening which provides some anti-aliasing when upscaling from 1080p to 4K, which I detailed here and here.
If you go to the slider and go full screen difference is actually noticeable, but its not too big. Even an update patch for PS4 Pro in 2016 would had reached this results. Now pay $700 for this...
If you go to the slider and go full screen difference is actually noticeable, but its not too big. Even an update patch for PS4 Pro in 2016 would had reached this results. Now pay $700 for this...