Within five years it is estimated that we may have a viable way of drawing wireless power for devices such as laptops, using a technology known as magnetic induction. This could have interesting implications for technical security systems, such as IP CCTV cameras and access control card readers, which can already draw their power from Ethernet cables. By using magnetic induction such a device could be truly wireless in both communication and power supply contexts.
For more on magnetic induction click on:
http://news.bbc.co.uk/1/hi/technology/7575618.stm
