Read more about it here - MIT Harnesses Power Without Plugs. Summarizing, MIT physics professor Marin Soljacic and colleagues were able to light a 60 Watt bulb from 7 feet away - without wires! The device isn't ready for prime time, being only 40 to 45 percent efficient and way too big (2-ft diameter copper coils) to be practical and portable.
For you Electrical Engineers, here is the abstract of the original paper and a photo of the power transmitter in action, from the magazine Science.
Wireless Power Transfer via Strongly Coupled Magnetic Resonances
André Kurs 1*, Aristeidis Karalis 2, Robert Moffatt 1, J. D. Joannopoulos 1, Peter Fisher 3, Marin Soljacic 1
1 Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
2 Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
3 Department of Physics and Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
* To whom correspondence should be addressed.
André Kurs , E-mail: firstname.lastname@example.org
Using self-resonant coils in a strongly coupled regime, we experimentally demonstrate efficient non-radiative power transfer over distances of up to eight times the radius of the coils. We demonstrate the ability to transfer 60W with approximately 40% efficiency over distances in excess of two meters. We present a quantitative model describing the power transfer which matches the experimental results to within 5%. We discuss practical applicability and suggest directions for further studies.