The final film is be the first stop-motion film shot stereoscopically, however this clip is in glorious 2D (otherwise it would just look silly on the Web).
I'm satisfied with this treat. I can wait to see the Other Mother and the Mouse Circus when the film comes out. I don't want to see too much before it's in the cinema. I want to see it as a whole - a solid story, excellent animation, great concepts, striking design - all at once.