What I don't understand is why it is marketed as a MacBook Pro, and not as a 15" MacBook Air. It has much more in common with the Airs than the Pros.
Technologically yes, in terms of industrial design, power envelope and form-factor no, it doesn't have the characteristic tapered edge (or the possibility to slide it into an envelope), and it remains very heavy compared to an Air: the weight has gone down to that of the "old" 13" MBP (4.46 to 4.5 lbs), but it's half again the weight of the 13" Air 2.96 lbs) and almost twice the weight of the 11" (2.38 lbs).
If you say "15 inch air" people have expectations that you couldn't have fit all the muscle this thing has into.