Market analyst NPD says that a single model of thin-and-light ultrabook -- Apple's MacBook Air -- owns over half of the market for such devices, leaving all the other manufacturers of endlessly MacBook-esque portables with 44 percent share, at least in the US. NPD analyst Stephen Baker says that the MacBook Air by itself is responsible for 56 percent of all US ultrabook sales, and that is based on figures prior to the recent release of the much-improved 2013 model, which the company thinks will only increase Apple's share.
