For whatever reason you dropped Thunderbolt from the new NUC units, political or engineering. There are people on tonymacx86 running Mac OS 10.8/9? on the NUC
I have just put one of those Thunderbolt NUC's into my basket. Why would I spend at least twice the money on a MAC?
Personally I'm going to attach various devices to my NUC, running both Windows and MacOS for Office and audio production. I'm looking forward to see what Intel's talented engineering force built here with the NUC and Thunderbolt.