What, what, what??? Single CPU???
My current 12x3.33 upgraded 2010 8 core performs better than this... We need dual Xeon !!!
You and I both know that Apple isn't going to be giving us heavy iron systems anymore.
It's all about building an upgrade path from the headless Mac Mini (with 5-6 external boxes connected via USB, FW800, and TBolt) to the iMac (with 5-6 external boxes connected via USB, FW800, and TBolt) to the Mac Pro (with 5-6 external boxes connected via USB, FW800, and TBolt).
Or from a Retina Macbook Pro (with 5-6 external boxes connected via USB, FW800, and TBolt) to a MacPro (with 5-6 external boxes connected via USB, FW800, and TBolt)
In the rare case that someone with an OG Mac Pro with internal capture cards and RAIDed HDDs or SSDs wants to upgrade they'll only have two choices.
1.) Get the new Mac Pro and then spend another $2000 for external enclosures for the PCIe cards and such. Gain an increase of about 10% or even if it was running a goofy benchmarking system in a 32 bit OS you'll get a 20% increase but still have to deal (with 5-6 external boxes connected via USB, FW800, and TBolt).
Or
2.) Spend the same amount of money on a PC system that does have internal expansion yet no Thunderbolt but will have up to a 30% or more increase in performance depending on the money you spend.
Personally, I am hoping the Mac Pro is priced right. I don't have any capture or internal cards, nor any highend internal RAID setups.