I'd say when you get into a fully kitted 2k video toaster you get into 'workstation' territory for my potentially personal definition of 'workstation'. For me a

I'd say when you get into a fully kitted 2k video toaster you get into 'workstation' territory for my potentially personal definition of 'workstation'. For me a 'workstation' is a machine built and optimized for a task that primarily runs that task and that task only. It is sometimes the 'core hardware' that is interesting, but often many of the peripherals are more interesting. Things I consider workstations include Avid and other video editing systems, machines built for cad, and yes many of the 'desktop' sgi machines which generally did nothing but run software like softimage all day every day. The 'workstation' largely died because general off the shelf machines because fast enough to perform those task almost as well. You now see a more open market for the peripherals that help 'specialize' a general purpose computer. Wacom tablets, video capture devices, customized video editing controllers, midi controllers, GPUs, etc