In Extremetech: Consider the Internet of Things or Wearable implications
" .. A new research initiative between a University of Washington team and TU-Delft in the Netherlands has created a microprocessor that can power itself through stray radio waves and receive programmable updates in the same fashion. While the CPU in question is exceedingly weak by modern standards (it’s a RISC-derived 16-bit microcontroller clocked at just 16MHz), it’s an order of magnitude more powerful than any other device that’s powered by ambient energy in the environment with no battery required. This has significant implications for Internet of Things development and for ambient computing as a whole. ... ".