I've been using a Macbook Air 2nd gen 1.86Ghz/2G/128GB SSD for 2+ years as main station along with a 23", then 27" screen. It has not slowed down my productivity at all but instead increased it! Being so portable let's you work anywhere, I carry it everywhere, even on the eliptical walker it's great to catch up on twitter feed or watch a video!
With a higher rez screen, greater battery, more memory & larger permanent storage, I can only imagine the new ones are even more suited to become your main development machine (and you won't be going back once you tasted it ;)
With a higher rez screen, greater battery, more memory & larger permanent storage, I can only imagine the new ones are even more suited to become your main development machine (and you won't be going back once you tasted it ;)