This is what I don't et about people who harp on about fps. Ok, yes when you run them side by side you will notice a bit of a difference, but not really in a game in full flow unless there is a cliff-edge drop. It's certainly not going to be game-breaking.

 The Base Xbox One version is 862p.

Combined with temporal AA, it is a really bad image. Even DF pointed that.

1. To a degree I guess. Hey, the resolution is the bone of the IQ. I guess nobody here is rockin on the 100' 4K TV, but it does matter. 

Also, HDR is not perfect in many TVs, I would say only few a premium TVs do it right.Moreover, HDR is not properly implemented in many games - yes, I look at u TloU Remastered. From what I read, the HDR in RDR2 is OKish, just like it should be.U even have the calibration of the effect, I would kill for it in many PS4 games.

2. Any benefits... Look, HDR is an addition. The image is not better or worse - it's different.

Why? The PS4 base is holding surprisingly well, much above of what I expected. If you got a 1080p Tv its definitely they way to go.

Somebody did forget that PS4 is not that " always 1080p" console like it was earlier.

Very smart business. It's the ultimate money making strategy. 

As I said, it might simply be by choice to keep the frame rate stable. 1800p might have made the frame rate more unstable, plus the temporal aliasing might have looked worse applying it for both axis.

XBox One X also has a faster CPU and much faster memory than ps4 pro.
PS4 has a slower cpu than base XBox One and eDRam can make a difference as well if used correctly.

Open world games are bound by CPU and memory speed a lot sooner than linear games. So if Pro uses the same hi-res textures as the X, the X has the advantage of the faster memory as well. Plus having more memory available also helps in keeping the frame rate stable.

So, nope, doesn't surprise me. 1920x2160 is equivalent to 1525p. It's better than 1440p, scales better than 1800p, and the 1.38x increase to 1800p could make the frame rate dips worse. What they could have offered is cinematic mode, 2.35:1 with black bars at a native 3840x1634 (that's still more than 1800p) and lock it at 24fps :) Most tvs support 24p judder free. Truly cinematic!

And sadly anti consumer.

I got the impression from DF that it doesn't provide much of a difference and the calibration options are lacking. However I'll check for myself tomorrow. Plus they said they would be looking into it more later. They did all the comparisons in SDR.

The image is definitely better with HDR. I've made screenshots of SotC where a lot of detail is lost due to the conversion to SDR. Night time and dark areas look much better with HDR and are easier to navigate. Day time doesn't benefit as much since you're not looking at the sky anyway. Of course if you play while the sun is out (the real sun) it won't make any difference :)

Resolution does matter, HDR does a lot more for the image though.

I understand that the developer can choose resolution they want, I'm just surprised the X1X is pushing DOUBLE the pixels vs. the Pro at a higher, more stable frame rate. 

I'm also confused as to why you're surprised that the base Xbox One runs the game at what is essentially 900p vs 1080p on the PS4 when almost every multi-platform game released in the last 4 years has been the exact same way.  

Xbox version it is.