Gorilla Glass is nothing but a brand put out by Corning.
It is not the "end all" of chemically hardened glass, not by a long shot.
I'm getting so sick of hearing about "Gorilla Glass", it is nothing new OR special. If you do not believe me, take a sheet of sandpaper to your Gorilla Glass screen, and then tell me how awesome Gorilla Glass is. Your screen will be a scratched unreadable mess, just like any other hardened glass product.
Too bad phone manufacturers have to look for every little "feature" they can market. If not for marketing, no one would know what "Gorilla Glass" even is