Woah. Now that's cool. It's really interesting to see that they are full 3D models but the shaders are done so that the ideal viewing angle is from the front and yet they don't look weird or broken from other angles. That's really nicely done.
The OP and this are quite beautiful. I can't quite put my finger on what I like so much about them, I'll keep thinking about it.
It is like a little diorama.
This one is much nicer. Fully fledged implementation. Awesome