I always said how the cylindrical Mac Pro could very well have been - instead - an ultra high-end Mac Mini.
Agreed. The ideal machine for me would be something along the lines of cylinder Mac Pro with the internals of a mid tier iMac. I don't need EEC or Xenon processors, but I do need reasonable GPU power (which I could now/soon get via TB3) and strong CPU performance in a quiet/silent package. A cylinder Mac with an i7 quad-core and mid-range desktop GPU equivalent would be perfect.
There just isn't anything on the market like that unless you're willing to have a single-use display with it (iMac) or have a pretty big budget (to over-kill on the machine).