In the house of the future, wire-free energy transfer could be as easy as wireless internet.
When Katie Hall saw a light-bulb glowing in the middle of a room with no wires attached she was shocked. Looking back, it was a crude experiment, she remembers: a tiny room filled with gigantic copper refrigerator coils — the kind you’d see if you cracked open the back of your freezer. She walked in and out between the coils and the bulb — and still the bulb glowed. (Video)