There are three factors that can be used to easily prove that the Macbook Pro is not a "Pro" laptop at all.
The first is heat management: The case/chassis is designed for aesthetics, weight management. It is NOT designed for maintenance or suitable cooling when the processor runs at 100%. It doesn't take a Apple Engineer to know what would happen if the computer is constantly overheating during high pro use.
The second is the display is atrocious. Yes it has higher resolution but what you lose in return is detrimental: yellow tints, uneven lightning, uneven coloration etc. etc. How can such a LCD be considered a "PRO", which graphic artist could work under those conditions?
Lastly, the graphic cards in Apple Macbooks are not sufficient to drive the resolutions. For the resolution being driven in the rMBP you need at least a 580m/680m. For game development it is NOT a PRO device.
So for simple word processing, checking emails, browsing web etc it's fine (although I could not live with a defective screen that Apple is pumping out right now). But for heavy duty content creation - Videos, Image, 3D development it is NOT a pro machine at all.
Some simple benchmarks and stats for the above factors would be enough to prove that the latest renditions are unacceptable and that the design does not meet the requirements for a "pro" machine.