Miniaturization of Motors Catch up with the 21st Centur

As this BBC article explains, the miniaturization of mechanical motors has not evolved at nearly the same pace as their electrical counterparts. Combustion is pretty much out of the question and as the the article states, the resistance of electrical motors when scaled down that small is almost more than can be overcome. So, take a tiny piezoelectric element, send a charge through it, incorporate a little bit of nature's design for microscopic propulsion and there you have a good recipe for modernizing one of humanities most influential creations.