Seriously, you people make it seem like apple is still that garage-based startup that is hungry for cash.... When that could be further from the truth.
The fact of the matter is -- apple has so much market share (let me remind you they are the most valuable company on earth, even as I type this the stock price is growing), and money stockpiled that they can literally afford to play around with developing whatever machine they want. Whether that means some gimmicky VR goggles that probably won't sell all that well or the Mac Pro itself.
These arguments are moot, because of the current situation that apple is in today -- it is
not the apple of 1997.
They are no longer that garage-based startup that is hungry for cash, where every single decision they make impacts them significantly, nor are they anywhere near bankruptcy -- far from it.
At this point, they make so much money from iPads, iPhones, Macbooks, and they have so much more money
stockpiled that they can afford to keep the Mac Pro around, even if they don't profit highly from it, but instead, as Zombie mentioned, it can continue to be their Halo product showcasing their ultimate potential.
I am tired of reading posts and articles from closed minded individuals who believe that, "because they're a business" apple absolutely cannot do anything daring....
Don't even get me started on the sad selfish individuals with the "I don't need it, so nobody else should either" mentality...
Please, wake up.