@Airbozo: I've been doing some work with the current generation NUCs for a personal project, so I'd be interested to see what you come up with. Really cool little devices, but not much in the way of aftermarket cases yet.
@xpirate: Type-C and USB 3.1 will definitely be awesome, but for the majority of docking use-cases, USB 3.0 will honestly probably be plenty. I have a tablet with a USB 3.0 A connector, and have briefly experimented with "docking" it with a USB 3.0 dual-video + gigabit ethernet adapter I have. As far as I have experienced, it "just worked". The 'alternate mode' capability in USB 3.1 to, say, pass PCIe traffic, may well prove to be a game changer, but IMO, the answer lies less in increasing the size of the pipe between the docking device and the peripherals, but in minimizing the data passed between the two. A great example of this is is AIRTAME, but I think the concept can be equally well applied to all components.