who said anything about native 4K. ps4 pro will do upscaling from a resolution that is between 1620p (2x 1080p) and ~90% of 4K (according to devs) which is more than enough if they use the checkerboard upscaling technique with good AA.Don't be fooled by the marketing the new PS4 won't be powerful enough for native 4k. It will probably just be 1080p upscaled with HDR and other tricks to try and improve the image.
The Xbox S may have enough horsepower to actually do native 4k but I have a feeling there will still be compromises made.
the increase in details is huge.