It is a sad fact that any display technology where image production comes from the varying brightness of elements that have a finite life is - inexorably - prone to burn-in. Any mechanism to address such artefacts cannot rejuvenate the impacted elements (well, not that I am aware of) - which leads to the conclusion that whatever those mechanisms might be, they are quite likely reducing the overall life of the panel. (Something that was mentioned above.)
Such an attribute doesn't affect me too much. Aside from a couple of OLED phones, the display tech around me is all LCD. I have two 27" IPS monitors in front of me now and the TV is a cheap Aldi 39" LCD.
The cheap TV is only Full HD - but that's pretty good enough to watch movies. I've set up a PC to run into it mainly to use Kodi and that works pretty well. (It's absolutely crap as a monitor.) It does have a bit of light bleed, but not all that noticeable unless you watch space shows - but then I try and forget about that and just get into the story.
It does, however, have one trait that I find rather annoying ...
In images where there is a notable area of gradual shading change, there are very obvious steps. It's like looking at a contour map overlaid on the image. If there was ever an argument for going for a high bit count video decoder, this is it. I sometimes wonder if it has an 8 bit decoder or a 6 bit! I sometimes dream of something with 12 bit.
For the most part, these irritations are passing and by not getting hung up about them, I get to enjoy my media.
I have seen 8K. I have seen OLED. ... and I have seen the credits rolling on a dozen screens on display in a major electronics retailer. The two Sony units were clearly identifiable - just by looking at the upward scrolling text. On all the other units, the text movement was jittery - but on the Sony units, it was buttery smooth.
QD-OLED certainly has my attention as well, but I am a little hesitant about the ageing issue of OLEDs. Yes, by having all the OLEDs the same colour, one issue of ageing is addressed - but they are still going to age. Elements being driven at different intensities will cause different ageing - so burn-in is still on the cards.
I can appreciate ALL the things that various manufacturers can bring to the market - and I look forward to seeing where we go with it all. BUT, I am not preoccupied with seeking the latest and greatest, shelling out more cash to watch material which - for the most part - makes little improvement in my life.
I held my 3 day old grandson for the first time yesterday. That was worth more than any TV.