A good demonstration of this is if you flip the comparison to something computers find easy. The world's fastest human seems to be able to do maybe 2 calculatio

A good demonstration of this is if you flip the comparison to something computers find easy. The world's fastest human seems to be able to do maybe 2 calculations per second, I've not got the details but let's assume that's a reasonable yardstick. That's 0.02 FLOPS/W. RIKEN apparently is at about 7GFLOPS/W. That's three hundred billion times more efficient. Not a fair comparison, but that's kind of the point.