Of course I meant internal storage, otherwise it would be an idiotic point. You can have an SSD and an HDD in the iMac. Not possible in the Mac Pro.
Completely absurd stuff.
And why would you want a loud and heat-generating slow HDD in your computer when you can just get a HDD-chassi with support for more than just 1 HDD and tuck that chassi away so that you get a quiet work-area?
All media should go external IMO and have internal SSD for the applications and OS.
Not saying the new Mac Pro's solution is the best but I for one welcome the storage solutions with it. GPU options though is another question..