@413x
I got my LG C1 on Saturday. Absolutely zero regrets. 4K HDR content is absolutely stunning on it! The thing that really jumps out to me is the highlights - night and day difference compared to Plasma. People talk about OLED black levels as the remarkable thing, but I think most of them are coming from LCD.
But I will caveat my enthusiasm with two things. Firstly, I haven't watched any broadcast TV with the set. I don't even have an aerial any more. I have absolutely no idea how well (or otherwise) upscaling works. And secondly, the soap opera effect is very noticeable to my eyes. Hopefully this can be remedied by tweaking the settings.
Overall though, Plasma to a modern OLED is a generational leap. No question about it. The OLED can display details and colours which would be missing or muted on the old Panasonic set.