If you do decide to go the OLED panel route please report back on your experiences. I'm sure that it will require some work on your end to get the best viewing experience.
Victor, I have done some experimenting. I have a 77" Sony OLED that is our primary TV. I took a bunch of images from my Zenfolio site. These are exported from big TIFFs and raws, to 3840 JPGs. My reaction was OMG. I was seeing my work in ways that I never had before.
Some positive observations.
1. The aspect ratio thing is not an issue. The large TV is not a frame. It is a wall. Think of it as a place to hang your prints of whatever size, and that is the experience that I get. In fact, you can have your display mimic the wall around it (some Samsung TVs can do this automatically) and then it really is like hanging your pictures.
2. There have been lots of studies showing that size is a key factor in determining the impact of an image. That why we print large. I can say that on a 77" TV at about 3m distance, the impact blows away any prints I have seen, other than the really big ones that are so expensive and difficult to do. I have printed wall sized images (or rather I have had them printed for me) and I think they have a similar impact to the big panel. However, I sure couldn't display very many of those massive prints at home.
3. I shoot a lot of specular materials. OLED, being a self-luminous display, does things with specular reflections that paper cannot. I have never seen metal surfaces look as real as this. They shine! This won't matter to most people, but it is huge for me. I am so tired of steel looking like satin. On the OLED, it glistens as it does in life.
Cautions that need more work
1. Like any monitor, TVs need calibration for realistic display. I suspect the color space and the calibration of my OLED are not as competent as those of my Multisync PA122 pro monitor. Just speculation right now.
2. Most images look stunning, gosh, gee whiz on the OLED. I am seeing details I miss in prints and loving the experience. That could be a problem in the long run. I would not call this a subtle display and there can be sense of "too much". However, I have not played with the TV ca;libration settings. They are on "Movie" mode, which is not the same as a proper calibration for viewing still images. Those settings are probably goosing contrast a bit.
3. I haven't used an LED TV for this. Those do not have the inky blacks and superb contrast ratio of OLEDs, but they may be fine. Definitely cheaper.
4. Some images look worse on the big display than they do as prints. I have not figured this one out yet. I think it has to do with smoother color transitions in the prints. Or maybe it is a size thing (see next point).
5. Not every image should be large. The built in slide show app I have zooms everything to fit. I need to find a more sophisticated app that will let me control both image size and any framing I might want to add.
6. The big one. Low resolution. With a 4K 77" TV I am blowing up what is basically a 13" print (300 dpi) to a much larger size. At 3m, that is not a problem. At anything less than that, your eyes can start noticing some crudeness in the render and at 1m it's pretty bad. The answer, of course, is a smaller 4K display, or an 8K unit. That would bring comfy viewing distance down below 2m. 'Course, an 77" 8K OLED costs about as much as a Leica summilux. I'll have to take another look at the LED TVs regarding this issue.
If I wanted to impress a bunch of casual viewers in my living room, or if I wanted to sell myself to inexperienced (with product photography) clients, I would have them view my work on the OLED. For you lot, though, the issue is more complex and the TV is clearly not suitable for everything. I suspect there is an art to be developed for panel display, just as there was an art developed for printing. I would love to see what a skilled printer and a skilled TV technician could come up with in optimising an 83"OLED panel for photography. With time, I will do the best I can, but I have neither of the requisite skills. What I would suggest to all of you is "try it". Then come back and post here.