The OLED screens that are starting to appear in consumer products were first developed 15(?)ish years ago. It takes a long time to go from "developed technology" to finished product. There are also possible unknown issues that may keep this tech from scaling up to useful production. On the other hand, when you see lots of promising developments in a field in a short period of time you can be pretty sure that some of them are going to work out. So you can't bet for sure on this tech, but it's a good bet that something in development now will work out.