Re: NAB 2012: HP

It makes much more sense, talking about the possibilities you have with a Z1.
It offers much more opportunities, is better and more comprehensive engineered. Most of professional Editing-, VFX-, or Grading-Software relies and gains the most power from Quadro-Cards,
not from some ATI-crap.
The ability to have Linux supported makes it even more interesting for those, who are running Linux-applications like PF Clean, or Autodesk Flare.
With it's close-to-sRGB Monitor it fit's perfectly as an ON-Set Grading
System for e.g. Assimilate's ScratchLab.
And at least, you are able to upgrade it in any way,
be it harddisks (Raid-functionality), Graphics, BluRay, or RAM.
And you can do it by yourself within minutes, if you got proper parts at hand.
And on top you have a really good and proven warranty and support,
which is quite important if your production relies on this workstations.
And before someone mentiones Appel Care... it crap. It's real crap and not worth a penny.
So basically... yes, you get much more out of a Z1, than of an iMac.

The only thing lacking atm is Thunderbolt-capability,
which I would consider as a future upgrade, once released for PC.