Not consistent but insiprational enough for people to make applications that look like it and hence breed a compelling look and feel for WPF applications.
At the moment it feels like we are back at the dawn of web pages, we are seeing some hideous WPF UI's with gratuitious use of 3D, zooming and not much else.
We need the guys at Microsoft to build a couple of first class showcase applications to show us the way.
Expression 'aint it.