Given the recent price drop of the 13" Retina MacBook Pro, and the $1,250ish price for a refurbished base model, I'm half considering upgrading to that model. I currently have a MBA from 2011. Specs include: 1.7 GHz Intel Core i5 4 GM RAM Intel HD Graphics 3000 384 MB 1440 x 900 resolution It's a very good computer, and likely the best I've ever owned. That said, I may be looking to upgrade to the rMBP. My brother is in the market for a new computer, and I said that I may be selling the Air if he wants it. Base price would be about $600, or $584 from Gazelle. There isn't a necessity for a new computer, but I'm a sucker for high resolution, and I almost made the plunge when the original price for the rMBP was near $2,000 (glad I didn't now). My usage: -Extensive use of Microsoft Office products (usually multiple applications at once) -Standard internet, email, web browsing -Some Xcode (not a dealbreaker, more or less a side hobby) -Some light games (RCT3, solitaire...) -Netflix, HBO Go, Hulu... -Occasional video conversion Basically, it'd be a work + school (graduate level) computer. My biggest gripe with the MBA is that if I have multiple applications open, it's hard to fit all the necessary info on the same screen without excessive window overlap. The prospect of a Retina display to aid with this is very, very enticing to me. Is the upgrade, for those with experience with both models, worth it? More specifically: -Is the battery life good? -Is the fan quiet? -Screen lag at retina settings? -Future proof? -Comfortable to use (namely, around the wrist area below the touchpad)? Thanks for the help in advance!