via Marco.org:
I’ve been using a Retina MacBook Pro for one week, only as a secondary computer, and I’ve already changed my font, redesigned my narrow layout’s header, and conditionally replaced an image with text. I’ve noticed that fonts, especially, respond extremely differently on the Retina screen: many of my old, non-Retina choices simply didn’t look good, and many fonts and metrics that were previously poor for screen use can be used nicely on Retina screens.
great advice.