Yes, I remember the promotional videos from Corning when Gorilla Glass was introduced. Very impressive. But then I dropped my iPhone from a height of 18 inches onto a wood floor. Even though it was in a heavy protective case, it shattered. My boss, who supplies the phone, was not thrilled. It costs a fortune to replace the glass, too.
The Iphone glass has been known to shatter just because you were carrying it in a linty-lined pocket and a some small particle got between the glass and the phone.