I bought a Sony Android TV a year ago, 43W800c. The purchased was based from PS4 sticking to 1080p, Sony was silent about PS4 pro all over 2015 or did I missed the news? Well, now PS4 pro is all over the news and so as HDR. So yesterday I dropped by at a appliance store and saw an LG TV with HDR playing a demo video made by LG. It was good I haven't seen that clarity anywhere and I knew it was a 4K video, the bad thing is I don't have the capacity/bandwidth to download 4K videos. I always choose 720p for the size/space, I really don't mind for real life videos/movies. So I checked the price list of HDR TVs, for the price I prefer LG and it's the 49" one, for the size upgrade. It's WebOS, it's ugly but I don't care. Not going to buy now maybe a year or the next.
Keep in mind theres a lot of "fake" HDR TVs. These are usually the cheaper ones. They can take and process an HDR10 signal, but they can't actually display it; usually there are limited to an 8 bit display, lack a wide color gamut and have pretty low peak brightness. The Vizio M 2016 is a good example of this:
http://www.rtings.com/tv/reviews/vizio/m-series-2016