That's the problem. There is no such known material. Even screens made of diamond would shatter just as easily. The shatter-proof, scratch-proof transparent rectangle requires a whole new, breakthrough innovation much like the all-month battery. It's beyond anything that exists now at any price.
I suspect it will be easier to invent anti-gravity so that a future iDevice can sense that it's falling, activate the anti-grav and float in for a feather-soft landing. As "out there" as that sounds, the challenge involved is probably about the same.
No kidding, Hobe Sound. I'm in Wellington. Moved out here from Jupiter about 2 years back.