Gorilla glass or sapphire glass might have enabled lighter tubes at a higher price, had CRTs retained popularity, but from what I can see, Corning never even considered it as a use case for Gorilla glass in their original 1960s attempt at development.

Would there be any point? Given the TV sizes of the 60s standard glass was probably more than strong enough, and the tube wouldn’t be very heavy.

No one would need to really think about until around 2000.