Wireless Power

How cool is this? Basically a dime-sized attachment that fits to any device (like mobile phones or pace makers and so on), and quietly converts all that static in the air into a constant DC voltage. Effectively makes batteries last for ever!

http://money.cnn.com/magazines/business2/business2_archive/2007/04/01/8403349/

At the moment this can only be used with low power devices.  So with laptops getting less power intensive, it would become easier to power them as well.  For higher-powered devices, I wonder if these can cascaded together to provide a higher power?