The ability to make OLED panels more and more flexible will most likely revolutionize phone design in the future. A new set of renders linked to the OEM Samsung show a device with a screen that curves not merely at its longer edges, but right down to the corners too. The blog responsible for this material also suggests that an under-display camera is part of this design.
https://www.notebookcheck.net/Samsung-allegedly-constructs-a-3D-curved-screen-to-go-with-its-under-display-camera.423856.0.html
There are benefits for display curved like this? Gimmick.