You can get thunderbolt PCIe enclosures right now that pretty much allow whatever type of expansion you want. The Thunderbolt2 doubles the potential throughput so I'm interested to see some enclosures that take more than 1 card.I think the design is very unique and I'm impressed to see dual Xeons, a ton of memory, and dual GPUs all in that small of a form factor.
The only real issue I have with it right now is the fact that this doesn't look quite as easy to upgrade, at least with traditional PC parts, when compared to the previous Mac Pro.
I can't wait to see the type of upgrades that the Thunderbolt ports will allow. I also can't wait to see if these same upgrades will be made available to devices like the MacBook Air.
Thunderbolt 2 and an external PCIe enclosure is clearly their intended path for expansion. It's plenty capable for that, preferences of card location aside. As for processor, single E5 is nothing to shake a stick at and certainly not comparable to the Mac Mini. It's interesting for sure, but this isn't the desktop people mistake it for. Never was. The iMac is intended to be the Apple solution to the workstations people use in their homes for the function of "a little bit of everything." The Mac Pro was always intended to be used in high demand production environments. I think when Apple stopped making tower systems other than the Pro, it confused a lot of people. These things aren't meant to compete with what you build on newegg.This Mac Pro is basically the new high end Mac Mini: single processor, limited internal expansion capability, small and stylish case. This is a wise and logical choice for Apple; they abandoned the real "pro" market long time ago, and a business workstation would not have made any sense now.