I bought the UK 4k of Watchmen Ultimate Cut and tried playing it in my Xbox One X and I got...

Hi BigMuk71.

This support page, Troubleshoot problems playing discs on xbox one has several steps you can try to assist you to resolve this issue.

I don't think so, Robin. I had an LG OLED 4K TV. And the Xbox One S was connected to to the LG TV and I used to play 4K games. Even if that's the case to play only 4K Blu Rays, it's still not supporting.

The Xbox One S plays games at 1080p but if played on a 4K screen, it upscales it to 4K,

The One X is needed for true native 4K,

I upgraded my Xbox One to the One S at launch to get full use out the 4K media content,

Then i upgraded my One S to the One X at launch to play games and media at true 4K,

seeing that you've already tried what i would have suggested, I'm not sure of what else you can try.

I thought that may be the case. But then I wondered why my 4K Amazon FireStick can still play everything in 4K. I mean, I can just watch all the 4K stuff on the FireStick and call it a day. But it just bothers me that I finally got a 4K tv and the Xbox
One X and it won't play Netflix in 4K.

I bought the xbox one x and using it on my native 4k uhd freesync monitor is great I never looked back.

But playing upscaled 4k on a normal 4k tv the xbox one s is a very viable cheaper option the s can also be purchased in various colours whereas the x comes in black only although I may have seen a white version but not sure on availability of that.

When the Xbox One X Release I bought a Panasonic 4K EX700 4K HDR are fantastic