Seems very "micro" in its outputs, relying on water evaporation on one side of a membrane. But the future is very bright with many of these micro-engineered solutions on the rise. Won't save us from global warming or any of that, but the personal benefits of things like low energy Bluetooth powered by button presses, micro voltages generated from brownian motion, meta-materials controlling sound, etc etc.
Very cool addition to the future tool kit.