I just finished watching a lecture from ted.com where Paul Debevec describes how his company animated a photo real digital face.  It's mind blowing:

Animating a Photo Real Digital Face

Now, while this is beyond anything that a normal Poser user can produce it does touch on things like diffuse and specular maps and something that I found extremely interesting, animated displacement maps.  It's funny 'cause I´ve been thinking about using displacement maps on V4's face to add detail and to make expressions more believable.  But animated displacement maps?  Do you think that could ever be a possibility with Poser?  Maps that react to posing?  Am I crazy to even thinking about it?

 Vestmann's Gallery