To me this looks like an example of Apple's craftsmanship in depth where quality and elegance can be seen at multiple levels, from the case to the internal hardware to the OS and its APIs.
Certainly one can find flaws, but compared to a typical Windows machine Apple has more craftsmanship (in my opinion). Windows exhibits more of the "just get it done" utilitarian idea.
A craftsperson can make the most beautiful, elegantly designed thing that is a joy to look at, use, and serves as a conversation piece... and still fail to meet the brief.
If someone needs a high stool for a high workbench, giving them an Aeron task chair is, while beautiful and well-made, missing the brief.
Don't get me wrong - I like everything about the Mac Pro but you pay for your thrills. I can't afford to lay out that kind of scratch unnecessarily. Apple has done a nice job with the design, no doubt. Meanwhile, I have a high end Windows PC for much less money. The speed thrills me, so I don't need a Mac to get a thrill.
Certainly one can find flaws, but compared to a typical Windows machine Apple has more craftsmanship (in my opinion). Windows exhibits more of the "just get it done" utilitarian idea.