I made the switch from a 1080p monitor to a 4K TV and there’s a difference. I’m able to read instruments and PFDs without zooming in and I’m able to see the landing runway from much distance than before. It also runs VRR and that makes much difference in framerate, it’s something you should consider because not every TV/Monitor have it.
I’m afraid I may need to revert back to 1080p because of the PC build I’m planning though. Well, for every choice there’s a sacrifice…