so is it worth while getting a 2014 macbook air or waiting for the refresh in 2015 and the so called "rumoured" retina display airs? basically the macbook air will be my secondary computer for uni as i already have a 2014 rMBP 15" and iPad air 2. i mean the 2014 airs looks like an amazing machine for what they are, but i know the retina display does make a huge difference. there also the possibility that these new retina airs might have decreased battery life. so confused what to do haha. help?