Screens on TVs and phones et cetera are always rectangular. Why? Why are they not round? Eyes are round. The Sun, the source of almost all of our light, is round. Telescopes have round lenses and mirrors. If a photon has a shape it would be round since it is described by sinus waves and interferometry. Sure, we have two eyes but that gives a 3D illusion of an oval rather than of a rectangular field of view.
In the corners of our unnatural rectangular computer screens' user interfaces, there are hidden stuff like the time of day and some abort/undo button. Stuff you don't want to see unless you actively search for it. Why have corners on a screen? Who came up with that idea? Cathode ray oscilloscopes were invented with circular displays, how did they acquire horns and corners?