Edit August 2015
There is a beta driver now to support USB3 docks. See the linked forum for details.
Edit January 2016
Out of the box working:
The video of the dock is not supported under Linux, and will not be for a longer time.
The dock uses a DL3XXX-generation Displaylink chip for video, driver support for this does not exist and is not planned by the producer in the near future.
I repeat: although Displaylink claims to support Linux in their FAQ, the latest generation does NOT support Linux
But the NIC and usb ports work out of the box, so if you want an expensive usb-hub/NIC, go ahead.
USB2-based docks with displayport should be supported, though.