It's been a while since I posted a TED talk. This is not one of those inspiring insights into the human condition. It's just a scientist enthusiastically demonstrating something cool I can't wait to have.
The commercial side of implementing this is as interesting as the science, when you think about it. The devices transmitting and receiving power are on matched frequencies, so other devices would not receive it. What use is that? I want all my devices to be battery-free, picking up power from broadcast transmissions as I walk around. On the other hand, I must be charged for that power, or no-one will invest in the infrastructure to provide it to me. Short of taxing everyone to have the state provide the infrastructure (in which case it will be as unreliable as any service where payment is guaranteed regardless of performance) how could this be done? Will the company transmitting the power have to trust the data from the receiving device? That's not under their control and could easily be rigged.
I am sure someone will figure it out. I hope it's soon. Batteries are much of the weight in our mobile devices and wireless electricity would transform their design as much as their function.