Like everybody says, the HDR does make a difference. As far as the quality goes, it’s one of those sorts of things where it may not feel like a massive upgrade at first for some movies, but when you look back at Blu-ray you realize how many little things are improved. I feel like the best pitch I could give is the fact that, for most movies, you’re getting them just about as good as they’re capable of looking (unless it’s just a bad transfer of course).