For what its worth my take to the OP post is that either you live in a cave or have only been exposed to Apple product your whole life. Lets skip the "Apple" product line for a bit, get out of the closet or cave and realize that PC's only have a half million different form factors. I have seen PC's built within toilet bowls, actual trash cans, R2-D2's, and many many more other things so I think you should venture outside of the "Apple" line for a minute or two to discover what kind of form factors computers have been designed within and around because its quite impressing.
Now my take on this whole cylinder / can like shap form factor is that its not all that breath through when considering Sony once had some pretty cool designs like their Vaio that was done years ago that was a flattend rounded like disc player (can't think of the model off the top of my head at the momment). The unit was small (smaller than this new Mac Pro) and quite impressing for its time and would still be in this current time period.
I also like how you high light the fact of how some people who mock this new design does so because he / she could probably never had afforded the previous model as it sat when it was available. Price wise I am sure you get what you pay for and the Mac Pro is the Apple high-end line if you will but as I don't recall what the starting base models started at I'm quite sure it wasn't too far fetched from a max spec iMac or Macbook Pro.
I can say right now that having not have purchased the new iMacs I would definitely consider one of these depending on the overall clutter by the means of how many things I would probably need to hook up to it. A 4TB minimum HD would be fine for me and a nice Thunderbolt 27" monitor would also suit it nicely as well. But as with all my setups I hate having wire clutter. Speakers, Printers, etc etc. All these little odds and ends things will lead you to have lots of wire clutter and with how the form factor sits it would be a chellenge to keep the area around such a beautiful machine nice and clean.