Another thing, is it currently even possible to make plastic as scratch proof as Gorilla Glass or something similar? I know there are studies in applying diamond coatings and things like that, along with all sorts of coatings they can work into eyeglasses, but I'm not sure how strong and viable for mass manufacturing those are.
Hard coatings on Blu-ray disks are very strong. I don't see why a manufacturer couldn't use a similar coating on plastic screens.