I hope all these future in-display cameras are within the status bar area as depicted and nobody gets the bright idea to put it dead center of the screen. I'm rather obsessive about display perfection and that little dot of shadow on a content area would be more than enough to drive me crazy.
I think that defeats the purpose? The main benefit that I see is she contact in video chat, where you'd want the camera pretty close to the center. If you don't get that, why bother at all?
Same reason for notches and glass backs and removing headphone jacks and curved screens: fashion. Smartphone sales are all about being trendy no matter how stupid the trend is.
