I think it's likely to remain a niche product. How many people really need to print 3D objects (compared to the number who need to print pages of text, photos, etc)? Without big volume production, the prices aren't likely to drop that much. Maybe when we all have holographic cameras the demand will be higher.

Still, it would be fun if I ever get to produce my Poser-based range of aquarium ornaments. Naked Vicky in a fishtank with a sword, anyone?