And some suspect that is not going to be the case in the relatively near future.
This sapphire smartphone screen is strong, strong, strong
http://reviews.cnet.com/8301-13970_7-57571618-78/this-sapphire-smartphone-screen-is-strong-strong-strong/
February 28, 2013
The smartphone screen on the iPhone above may look like it’s made of glass, but it isn’t. It’s made of sapphire....
n the case of the demo, a thin sheet of sapphire has been glued over a regular iPhone 5’s chemically hardened Gorilla Glass 2 screen with some transparent adhesive — it’s completely clear. To my eye, the sapphire overlay is indistinguishable from a pane of glass. That is, until I’ve spent a few minutes deliberately trying to scratch and smash it with a hunk of craggy concrete.
I don’t have a smart phone, or even a dumb one for that matter, but I did have a 9” tablet. The a neighbor sat on it in my living room chair. It busted in a million pieces.........