While the LG CX was possibly the best consumer display on the market the technology itself isn’t that good for HDR.
But this is also because there isn’t actually a display technology available to the consumer market that is properly capable of presenting good HDR for which you need both good black level control and also high brightness.
High End consumer display tech’s would include MicroLED but in practical terms this is really out of reach of most consumers.
Also, it seems we are also passing through the period where content producers don’t fully understand the workflow and how good HDR should be properly authored. We are still at the stage where it’s a label that looks good to have on your content, a bit like 3d was about a decade ago. (and yes, there was an absolute deluge of poorly authored 3d that just didn’t work well even from very reputable film studios. Side to side panning 3d scene just falls apart at 24fps for example)
In truth, even as a professional video engineer I have only seen a couple of examples where HDR was actually done well with both the content, display tech and it’s set up “doing it right”
Blown out whites and crushed blacks are not HDR even if some games content can look quite striking this way and even though I’ve not thrown FS2020 up onto a proper LED display and tuned it for good HDR my feelings are that the implementation here is still more “nice label” than well authored.
All that said, of all the display tech’s available to the average consumer OLED is probably the best but just expect too much from HDR until it has stopped being a buzzword and content authors actually start working with it properly. (which will mean authoring content that works within the constraints of what consumer level tech can actually achieve. HDR with a 1000nit requirement simply doesn’t translate to a panel that can only manage 400nits)