I think 'energy harvesting' on a micro scale is an important contribution to macro energy issues.

Are you suggesting more "Knee tremblers"?

I want one of those, I must be power-hungry.

During the 1970's and on some people have used bicycles and other contraptions to harness electricity. I saw a news report back then about a family who had to ride the stationary bike to power the TV. I thought that was very clever.
I would think that any moving part of the body, including skin, could produce energy that could be harness to run a few small tech appliances and the excess energy could charge the battery pack;D