This sounds cool:

There may be hope — however distant — for recharging nearly drained cell phone, laptop and other batteries without plugging them into the wall, a scientist said. Although he hasn’t built a device yet, Massachusetts Institute of Technology physics professor Marin Soljacic said he has figured out how to wirelessly recharge batteries, much like the way people can surf the Web untethered.

Reminds me of some of Nikola Tesla‘s ideas.