Looks great.
I'm just thinking that the microscope shot camera may have the wrong camera settings. I can some perspective there between the teapots, and it looks like the camera is placed somewhere between them, very close to the surface. If that was a microscope the distance of the camera to the objects would be very big taking the scale in consideration. So it would rather remind a very long focal length shot, with no perspactive\size changes between these little objects. The DOF would be very shallow though as in your render.
This is just my impression, I would need to check on it and I'm not sure what effect you were aiming for.
Anyway, very cool experiment, I hope you will show more stuff :)