Sapphire is already known to be more scratch resistant and shatter resistant than glass. What's to know? It's common knowledge. The point is that costs have come down and Apple is seizing that opportunity to bring it to their premium products. Won't see it on a plastic premium phone from Samsung, well, until Apple does it. Oh wait, the finger print sensor hasn't been copied yet and it's covered in Sapphire already.
Guess Samesung has a lot to catch up to.