Does the Retina MacBook Pro just keep getting thinner until the Air is obsolete? Is there some fundamental technical reason they can't keep iterating the Air thinner and put a Retina display on it? Or a business reason why that's not a priority?
If they want to make a Retina Air as thin and light as it is now, they need some sort of breakthrough. One option that has been mentioned is to power the Air with ARM instead of Intel--like an iPad. But that would that probably would require a heavy software translation layer to run OS X apps like Office or Photoshop.
"Pro" is the same. Everyone wants the "Pro" thing. No matter if they will just browse Facebook or run serious business on it
I will double check the 13" new Macbook Pro to decide to get it or 13" lightweight Air :P