Here is my 2 cents:
I've been using desktop towers as my digital hub since the day I retired my 486 laptop. Haha, that was 1998! I've had a few laptops since those days, but never has the thought crossed my mind to use one as my primary machine. I am not a "Creative Professional" in the sense that I don't make a living off of producing videos or music, however I can think of so many other reasons to buy a tower!
Anyone that thinks the Mac Pro was exclusively for "Creative Professionals", or believes that they are simply because they purchased a Mac Pro is clearly a victim of marketing. Too bad.
Really though - want to know my favorite thing about towers? The cooling system! If I want to, I can beat the crap out of a tower and not have to deal with anything other than a slight increase in ambient noise.
iMacs, Mac Minis, and MacBooks all use those damn squirrel cage fans. In comparison: They are noisy, clog up quickly, and do not cool nearly as efficiently. Sure, they make nice pretty thin machines, but being able to do whatever I feel like doing at my desk
in comfort is a big deal.
It's also nice being able to change out a hard drive (or optical drive, or a number of other components) inside your machine without having to take the glass cover, the screen, the logic board, and half the other crap inside out!
It's also great to be able to add additional monitors, USB ports, firewire ports, gigabit ethernet ports, and the like without having to add stupid dongles.
I despise dongles. Expansion cards sit inside the machine and if you screw them in right - they won't fall off when you move the machine! XD
Did I mention I can change the hard drive without voiding the warranty?
Part of the reason the Mac Pro has become so stagnant is Apple. Since the end of the PowerMac G5 line, people have been begging for a ~$1500 tower with a cheaper desktop class processor and board.
You know what? I don't even care anymore. The only way I'm getting a Mac Pro is if I win the lottery or I manage to swing a REALLY good deal on one (used or something?) Otherwise, with any hope I'll be a happy owner of a 27" iMac next year
