I was under the impression that all the iPads right from iPad 3 where Scratch Proof and Scratch resistant since they use Gorilla Glass Screens. I know if I were to put sand or dust on it, it would scratch easily but I am not talking about such harsh scenarios. I am talking about Normal Usage in Normal Conditions. I have been using and taking care of my iPad-3 screen very carefully, but still it has developed a Hairline Kind of scratch. Which is very fine but it is there. My iPad is 4 Years old. Do the current generation iPad's especially lets say the iPad Pro does it have a good scratch resistant Gorilla Glass Screen ?