Thanks, Kirby. It's amazing how much "other stuff requirements" are being generated by the rMBP purchase. Of course transitioning to USB 3 and TB are a big part of it.
Better start saving for a "retina-density" large screen monitor. I was showing a client some images on my (109 ppi) 27" wide-gamut display when she looked over at my rMBP (220 ppi), tilted her head, looked back to the big screen, looked back at the rMBP, looked at me and said, "Is the big one supposed to be fuzzy?
Imho, the Retina display is a sea change. It almost instantly re-calibrates everyone's expectation of what a screen display should look like. I purchased the iPad because of the Retina display (I use it for my digital portfolio). I knew within a hour of having the iPad that I would buy the first 15" Retina laptop Apple made.
In the meantime, I'm getting a deeper desk for holding my large monitor when clients visit. Maybe a LumLander can advise me how deep it should be. I have trouble understanding the relationship between ppi, apparent sharpness, and viewing distance (dots/viewing-angle?).