From a Moore’s Law obsessed piece on computer improvement:
As Moore’s law runs into the sand, then, the definition of “better” will change. Besides the avenues outlined above, many other possible paths look promising. Much effort is going into improving the energy efficiency of computers, for instance. This matters for several reasons: consumers want their smartphones to have longer battery life; the IoT will require computers to be deployed in places where mains power is not available; and the sheer amount of computing going on is already consuming something like 2% of the world’s electricity generation.