Sony announced today that the company develops Wireless Power Transfer technology.
The Sony Wireless Power Transfer system can currently transfer up to 60 Watts of electrical energy over a distance of 50cm (at an efficiency of approximately 80%, approximately 60% including rectifier.)
Total wireless TVs are in our near future as it looks.
This new wireless power transfer system from Sony incorporates a form of contactless electrical energy transmission technology based on magnetic resonance.
With magnetic resonance, electromagnetic energy is only transferred to recipient devices that share the identical resonant frequencies as the energy source, so energy transfer efficiency is maintained, even when misalignment occurs.
Furthermore, even if there are metal objects located between the transmitter and receiver, no heat induction occurs.

he new wireless power transfer system combines these technologies to realize transfer efficiency of 60%, even when a rectifier is included. Sony has also developed passive extender units that are set to the same frequencies as the transmission and recipient devices, enabling the transfer distance to be extended from 50cm to 80cm without any degradation in transfer efficiency.　　　　

The Sony Wireless Power Transfer technology is still in prototype stage. There is no word yet how long it will take until Sony can market the wireless power technology in their TVs.