Tesla's electric vision.

Efficient wireless transmission of electricity 

 has eluded scientists for years. Radio waves, microwaves, and even laser beam transmission of power have fallen short. But in 2007, MIT researchers were able to safely transmit power wirelessly 7 feet across a room, a feat heralded as a first step to cutting the power cord. Incredibly, a world in which all electrical devices would be automatically powered at all times requiring no charging or wires was envisioned more than a century earlier by inventor Nikola Tesla. And by some accounts, he was close to actually achieving that goal.