The MacBook Air hasn't changed in a massive way for the past several years. It hasn't really needed to. Apple's PC sales have done exceedingly well in the recent past - since the MacBook Air was launched, really. Now it might be time for a new design in the form of tiny feature changes. The first - and perhaps largest - of these is a click-less TrackPad. This wouldn't be a big deal in a PC - the "tap to click" feature has been in play for several generations - but for Apple computers, it's relatively new.