I would love to see more HDR and Dolby Vision support.
I was shocked when I went to Amazon Prime on my 4K Joey to see that it could support HDR on it! (Especially after I was told by the folks who made the 4K Joey that it would never be able to support HDR!)
Of course with that said, its been 5 or 6 years now since the 4K Joey came out and on DISH other then a few VOD's there still is not much 4K to watch. I was in the store the other day and see they have 8K TV's out now... why 8K when there is still not much 4K content?
I am surprised we dont have any real live 4K Channels yet. Look at ESPN, most of the in studio stuff is shot and produced in 4K. The only people who get to see it in 4K are those in the control room. A friend at ESPN tells me they are not offering 4K because they have not found a way to make money on 4K. They say this was the reason the 3D channel died.
But my wife loves watching TV using just one box and not changing inputs so she watches a lot of Netflix and Amazon Prime Myself I like watching those using the app on my Roku TV as I think Dolby Vision looks so much better than standard HDR.
All this and I think back years ago watching SD over the air with rabbit ears, and what the picture looked like then (and what we thought was acceptable) to the picture we have now.