I think it's quite cool, personally. I certainly don't have anything so detailed.
Here's what I'm working on:
This is a fairly accurate skeleton (as far as proportions are concerned, not the exact shape of bones), very low-poly. The skull and teeth are classically modeled, but the rest is entirely made with the skin modifier (so very easy to customize).
I plan to use him for an anatomy study. I've begun placing muscles:
The muscles themselves are simply lines with skin modifier applied. I intend to put a mesh on top with shrinkwrap, and rig the muscles to deform correctly when the bones move. Just a fun project, I don't know if I'll finish.