For all intents and purposes, the 13" Pro as it currently is is dead and likely outsold by the 13" Air for many reasons. I also don't see how you can stick in a dedicated GPU while cooling the system efficiently and having good battery life. The Intel HD 4000 runs a retina display just fine, since on the current 13" Air, it can power the internal display and 2 Thunderbolt displays. That's far more pixels than one Retina display.
6/14/12 at 10:44am