I've only been playing the game on my X at my mate's house on a 1080p TV so far. Will try it on my 4K when I get home later or tomorrow. My mate has just bought the PS4 version and has just fired it up on the regular PS4 and I have to say, I'm really quite impressed with how good it looks and runs on there. It doesn't look all that different to the X on the same 1080p TV, just a bit softer. I'm sure the difference will be more apparent when I finally get my X on my 4K TV though, but at 1080p, I am impressed.