I want a OLED screen, but the prices are too high, and burn in is still a pretty common issue. The IQ of the OLED screens is remarkable when sitting next to a Samsung QLED Screen that they named to try and confuse buyers with OLED.
I also hate all of the remotes, none of them are easy for me to use with the loss of feeling and control in my fingers..
The Amazon Fire TV remote seems to be fairly good, but has limited functions, and voice control is not there yet. There are some remotes I have not tried, it seems to be difficult to be able to try out a remote when looking at a TV set, they are all locked away.
As far as 4K is concerned, what I see is better contrast which makes the image appear much clearer. It really does not make any difference to me as to 4K or 2K, but a clearer image and better color depth and contrast do make a big difference, and right now, there is no choice, all the new ones are 4K, even the $300 55 inch LG models I've seen at Costco are 4K, its no longer a selling point, its just standard, even my Fire TV streaming device is 4K. My internet is too slow to do more than one 4K user, and not fast enough for 8K, so I'm likely getting lower resolution in many cases. Live sports seem best.