When the 15" Retina MacBook Pro hit store shelves this past summer, MacBook Air owners hugged their slim, lightweight laptops tightly while looking longingly at the beautiful display of the larger machines. "If only Apple would release a smaller laptop with a retina display," they wished. It took a few months, but it's here: a 13" version of its Retina MacBook Pro offering a relatively lightweight, "pro" oriented laptop in a smaller form factor. Having spent a good amount of time with the 15" Retina MacBook Pro this past summer, we wanted to get a feel for what the smaller size could offer.