Wireless Electricity

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Summary
Wires are commonly associated with electricity. It is surprising, therefore, that people thought electricity would never be adopted widely if wires were required. Yet it was adopted, but we've only recently started to shed the wires.

(Video: TED)

Commentary
Earlier efforts focused on charging pads such by PureEnergy and SlashPower. The cleverness of MIT's technique is that it combines induction with resonance to achieve power at larger distances. That is, the resonance allows more of the power to be transmitted via induction to the receiver.

Meta
What are other potential uses of wireless electricity?