The creature editors just arent that impressive. Stretching and adding bones to simplistic meshes and distorting them with a few skins to choose from and adding bits mr potatoe head fashion isn't that tough in a good engine.
That comment is just mean. :)
It's not just metaballs and bones. It's not easy at all to reach that level, and I'm sure some of their algorithms could be useful in 3D tools. The fact that the creature creature looks like a simple playground (which hopefully will be exanded in a Sims fashion) doesn't mean that it's an easy task to code it properly.
Dynamic motion isn't *still* a big deal but surely will become more and more important during years (a good example is all the hype around Euphoria).