I’m with Sony on this. There’s really no need- few people have eyes good enough to notice the improved resolution. And there is not much content for resolutions that high, so you just display the same old stuff only with more pixels.
I just don’t see a good argument at present for phones going past 1080. Maybe when we have more 2k content available, but for now, just stay at 1080. It’s plenty for any mass market user. Optimize things like refresh rate, color accuracy, contrast, and so on. There’s a lot more room to make noticeable improvements on a screen this size than there is with higher resolutions.
That being said, companies should research and optimize the tech to go into the 2k range on a phone- the content is likely to come eventually(and being able to just display it at the resolution it is recorded at will be helpful for image quality and performance), and there are probably specialized use cases where it’s useful now. But putting it into a mass market phone is just silly.