Basically what Octane said. Many types of workstations exist, I think they're talking specifically about "Graphic" workstations, which are real good at graphics and rendering, but not necessarily realtime graphics and rendering.
Think the difference between playing Cawwadoody or working on a Pixar film. Not exactly the best analogy (Pixar has some crazy fucking proprietary internal cluster mega computer thing), but its apt.
I currently don't have any real workstations, I had a computer stronk enough in the college days that was basically one slash my gaming machine, but the inexorable march of time has basically nullified it as tech progressed forward. Workstations kinda got co-opted by the bitcoin mining fad for a bit I believe. These days its almost easier just to spin up and spin down some AWS configs.