You're just showing how limited your vision is, never mind lmao! Sure by your logic, why use "gimmicky" things like microprocessors and LCDs when we have good ol paper! And why use a car to get from point A to point B when I have a pair of legs!
Google "a day made out of glass" and you'll see the possibilities. Open your mind ! Lol
Did I state a date? Timeframe other than by ten years from now? You ask me to open my mind? Open yours. Your concern is phones made out of glass? What about a world for your (god help us) kids to live in.