That's stupid, UNIX isn't a single entity, a lot of Unix systems are designed for workstations... and Unix has always been and still is used on high power workstations.
If any of you have seen behind the scenes documentaries of movies, a lot of the people working on the CG effects are using Unix systems. (
If you have the Transformers movie, watch disk 2.).
I use OpenBSD on all my desktops, people may think it's strange.. but It's not, if anything it's improved my skills maintaining the OpenBSD servers at work.