What are you talking about? The 13" RMBP weighs 3.48 pounds. The RMB weighs 2.03 pounds. That's not half a pound. That's a pound and a half. Some things that pound and a half are:
BJ
Hi BJ if you'd read the thread of the discussion I was involved in, we were discussing the macbook air not the rMB. All of my information for the Air was correct. My point was to all those moaning that there wasn't a retina air (a major theme of this thread in case you didn't notice), that there is no need for one with the rMBP being a better computer of smaller size and only slightly heavier weight than the Air.