AirPlay, AirPrint are still in use. The Air name for Macbook and iPad lines was all about thinness. When introduced, these products had thicker predecessors. It's irrelevant now for iPad, as everything is pretty much the same thickness across all models. For Macbook Air, it is no longer the thinnest product in the line-up. However, Apple can't quite get rid of it just yet - not until they offer a sub $999 Macbook.