I can't tell any difference on my TV between HDR encoded 4K discs, and regular Blu ray discs. I guess there is some difference just I can't see it. I did not buy a really expensive 4K UHD tv though. This whole 4K deal is what the businesses call perceived obsolescence. They try to make us feel our old DVD's are garbage and that we have to rep0lace them all with blu rays, then they want us all to replace those now with 4K. and rebuy all our films. I'm not playing the game anymore. I have a DVD of Halloween and Evil Dead, see no reason to buy a new copy of either.