Is now a good time to get a Macbook Air?

My 4-year old windows laptop is battered and bruised, and I'm in a need of a new one. Going for Macbook Air cause of that 12 hours batter life and portability, but after looking at release dates, airs seem to be announced every june, so am I best waiting till then and buying the 2014 edition? Hard to predict, i know, but what are you thoughts on a thinner, lighter body and retina display be included in the 2014 edition? Or will the chances be a minimal upgrade?