I've no idea either. It's like they don't know what to do anymore to try to keep their stagnant smartphone market share... Which is understandable. I would be surprised if the 21:9 Sony mobile screens will work with consumers. I don't like it.
Same thing with full screens, then notches, then punch-holes, then what ? Back to full screens ? At last. And flagships are more and more expansive as well. Even if today mid-ranges are past flagships... Now foldable phones. That cost a bone, complete with scratchy plastic Oleds and experimental hinges. Basically selling "beta" hardware at €2000+... That's even worse.