Not much difference there, and that's zoomed in. Will be even harder to notice while playing.

Are they at least making the SP 60fps or something?

original ps4 uncharted 4 is not in 1080p?
the resolution gain is crystal clear, but if the u4 is already 1080 on old, we wouldnt see any resolution gain on 1080p screen ps4 pro.

jpeg compresses better (in less bytes) a low quality than a high quality image.

So, maybe the not compressed version of ps4 is lower quality compared to pro imae version.

Yes it's, downsampling and better texturing make the pro version better.

Lol, the way people say something thats running at 30fps should be made 60fps is funny.

Do you guys have any idea what doong so entails?

Unless you are sitting inches away from the screen, you won't notice anything.

1440p>1080p

On a per picel basis the amount of data resolved is fixed. So if you resolve for a 1080p image you will never see 1440p/1800p/2160p details automagically appearing.

But if you resolve for a 1440p image, as is rumoured to be the case with U4 on the PS4pro, downsampling/supersampling from that to 1080p carries most of the detail rendered at that higher rez and makes them vissible on a 1080p set. It will still not be tbe same as running it natively or on a higher resolution display but thsts more to do with the screen door effect (think gaps beteeen pixels, more pixels you hsve the harddr those gaps are to spot) than anything else.

The "resolution gain" you are seeing in these comparison shots is due to  the reference image (game running on PS4pro@1440p instead of 1080p) having a higher pixel density (which means more details are resolved).

On a 4k display, this would look even better than what you are looking at here. 

You wont habe to sit inches away from the svreen to notice the difference between 1080p 1440p/1800p/2160p. a simole side by side comparison will make it obvious. 

but when comparing higher resolutions than that, say 1800p/2160p.... you won't notice anything even with a side by side comparison. Then you would have to out your face up to the screen to notice those differences. 

I see the same textures at a higher resolution, that's not better textures that's more fidelity to the original textures. Like when you play old 64 games on an emulator, same textures, higher fidelity.

Nah the ps4 pro image is saved at 3840x2160, hence the big difference in file size.
Comparing image quality on images that have been compressed down to 3.3% of their original size is what's a bit pointless.
Actually the ps4 version is less compressed at 5.1% of its original size. 1:20 vs 1:30

The hair looking weird is all because of compression artifacts.