In addition to being thinner, the buttons, camera, and microphone hole(s) are in slightly different places on the Air 2. I'm not going to be able to use my Zagg keyboard case without doing surgery to it. I thought the feel and size of the Air 1 was perfect and really wish the Air 2 was the same. The Air 2 thinness is approaching the point of being silly. It's so thin that the headphone jack opening wraps around to the back.