Total Light Equivalence and Moores Law

Moore's law was only about the number of transistor you could fit in the same space at relatively the same cost. Also, it is not a real law, it's just something he said that turned out to be pretty much true for many years and is not anymore. Mainly because number of transistors do not = more computing power, many other factor contribute to that.

read this:
http://en.wikipedia.org/wiki/Moore%27s_law

But yeah, sensor efficiency does increase as technological advance are made and therefore comparing a FF sensor from 3 years ago with a m43 sensor of today is not a good comparison indeed.