A very lazy photoshop, as the creator skips over anything that he would have trouble lining up perfectly. Personally I wouldn't mind having to use an external disk drive like the Air. I rarely install programs, buy CD's six or eight at a time so I can load them all in a single night some time, I don't burn disks with any regularity. But I would assume that Professional MBP User A disagrees with me, and for good reason.
Also compare the color of the aluminum surrounding the screen to the aluminum on the edge. The former is a little darker, bordering on brown.