You got 720p,1080p, 4k. More pixels. Doesnt take a fuckin brain genius to figure out if your tv's picture looks better because of course it does, and you don't gotta do anything to get it to work. but they realized that past 4k, shit ain't gonna look much better for the cost. so what do they do? more colors per pixel. only problem is color settings on tvs suck. tv manufactures handle this like dogshit. so now you gotta spend 30 minutes before watching a movie cause your fuckin tv automatically changes the setting from time to time for no fuckin reason. all this just to get slightly more colors. it's not even that noticeable. i fuckin hate HDR. i fuckin hate tv manufacturers.
the shining's still a beautiful movie but fuck me did i not notice the HDR one bit.
HDR when done properly is actually amazing, I took my ps4 to a rich friends house to play Gran Turismo Sport on their HDR TV, and the difference is night and day. This is because the developers of the game calibrated the HDR to pretty much work on any TV made by the major manufacturers, and dumped a ton of time into it. However that is the exception, probably 99% of HDR content looks worse than the normal equivalent due to a lazy implementation by the movie production company/game developers or the TV manufacturer. Seriously there is so little good HDR content out there (not that I'd be able to tell on my 10 year old 720p TV ), all the different implementations and standards are a great example of capitalist inefficiency.
Watch this (with HDR on of course) and see if it's good or not for you: GT sport in HDR