The iPad 2 was much thinner and lighter than the iPad 1. The iPad 3 introduced Retina which made people want to upgrade from iPad 2. The iPad Air like the iPad 2 made the design much thinner and lighter. The iPad Air 2 once again made the iPad thinner, lighter, added Touch ID, went from vanilla A7 to A8X, and doubled the RAM. The jump to iPad 4 from iPad 3 was probably the last model that didn't have people waiting on line to get the new iPad. Will the iPad Air 3 have a modest feeling of wanting to upgrade like the iPad 3 to iPad 4? Because they will probably keep the same amount of RAM, and I can't imagine it getting any more thinner or lighter. Unless they change the design to look like the iPhone 6?