Notice half of the retina machine is filled with batteries, theres no room for an optical drive and all the standard features that it used to come with. Same thing is going to happen to a 13" MBP but theres even less room there. Apple is really pushing the tradeoffs and compromises, not truly improving the entire product. IMO Retina display has too many compromises for what you gain. IPad3 had a number of tradeoffs. Crazy resolution on a laptop isnt always a good thing because now you need stronger video cards, better cooling, and/or bigger batteries to get the same performance. Then at the same design they are trying to push the chassis thinner and thinner which has its own compromises. A design ceiling is going to be hit soon and its going to be hard.If the resolutiion on the Retina 13" MacBook Pro is going to be 2560X1600, what are they going to use to push the pixels with? The HD4000 graphics would seem to be inadequate, and a full tilt GPU will end up making battery life extremely short, and the system will run exctremely hot, if it doesn't catch fire. There is a lot less room inside the 13" MBP than in the 15" MBP, and the 15" MBP is jammed solid altready. I know about the "new" cooling system in the 15" Retina MBP, but that works with two fans, and I have my doubts about it being able to cool a Retina machine (with i7 (probably dual core, not quad core) and GPS) with one fan.