I disagree on the safety note, only wireless electric current of a certain resonance frequency (like they wre talking about) would affect you, much like only the right frequency radio rays will damage your health. I feel if they chose the right frequncy, and made it universal (which would prove problamitic) to all devices, it would be safe, except if the witricity resonating frequency was all the same, the receiver (laptop, phone...) may steal signals from a different source.