Dell announced a 30" OLED display in 2016; then it re-announced it (for lack of a better term) in April 2017: https://www.anandtech.com/show/11272/dells-ultrasharp-30inch... and since then it seems that nothing public has been said. I wonder what happened in there: two years of vaporware is unfortunate, although I have zero technical expertise in this domain, so there are likely good reasons behind the scenes, even if I don't know what they are.

OLED TVs are common, but something keeps them from being commonly used as computer displays.