You can bet on the coating wearing out...
The experience lots of Macbook Retina users have with the AR coating speaks volumes about this problem...
https://discussions.apple.com/message/27778212?ac_cid=tw123456#27778212
Apple has decided to apply an anti-reflective coating on the new iPad Air 2. And whilst it seems like a great idea at first, I'm wondering if it is really a good idea in the long run.
Those of us who wear glasses will understand that even with decent quality anti-reflective coating(E.g Crizal), they wear out fairly quickly, especially if you clean them with a cloth often.
The experience lots of Macbook Retina users have with the AR coating speaks volumes about this problem...
https://discussions.apple.com/message/27778212?ac_cid=tw123456#27778212