I've just finished reading this article, Brain Power, from Spectrum.

It's about some strange new science such as neuromorphic-engineering, which stands for biologically inspired electronics. The whole ideea is mixing digital and analog computing to achieve improoved processing speed and power-saving, as mother nature does. Think of this, for instance:

Consuming about 50 watts, that game console throws off enough heat to bake a cookie, whereas the inner ear uses just 14 microwatts and could run for 15 years on one AA battery.

This must be something we'll se a lot in the near future.