Do you need to keep your cell phone in a protective case?
Check out this really interesting Pogue article in the New York Times: "Gorilla Glass, the Smartphone's Unsung Hero". Here's a tidbit:
“It’s the screen of every touchscreen phone, like the iPhone and Android phone, plus the iPad and iPod Touch. It’s an amazing story. Corning invented this stuff in the ’60s, but didn’t know what to do with it. Then a few years ago, someone showed a piece of it to Steve Jobs. The guy dropped a piece of the glass into a bag full of keys and shook it hard; it came out without a scratch on it! Jobs immediately seized on the idea of using it for his iPhone. Today, Apple buys practically all the Gorilla Glass that Corning can make. Apple is the world’s No. 1 consumer of it.” (from Pogue article in the New York Times: "Gorilla Glass, the Smartphone's Unsung Hero")