Genius! If done right, with a real cloth (and well-fitting) dress, a Revoltech Shinku would be awesome beyond imagination. I want one!

For the uninitiated: Revoltech is a system of fully rotating joints which allows action figures to have unprecedented freedom of movement. As seen in this picture, it would be a perfect fit for Rozen Maiden!
Seriously, Japan, just make it and I'll buy the whole set. Twice.