Scientists at Disney Research present what one can describe as room-scale wireless power delivery-- a prototype living room housing 10 objects, all powered without need for cables.
Dubbed "Quasistatic Cavity Resonance for Ubiquitous Wireless Power Transfer," the technology is free roaming, meaning one can move around the room and their smartphone will immediately start charging, with no need to be close to a wireless charging pad. It is also very efficient (around 40-95%, depending on the receiver's position in the room) and can deliver 1900W of power before the specific absorption rate (SAR) becomes dangerous for human beings.
However, like all things sounding too good to be true, the technology comes with a caveat-- it requires a purpose-built room, with walls, ceilings and floor built out of aluminium panels. A long copper pole runs in the middle of the room, and half-way down the pipe is a small section housing a ring of 15 capacitors. Outside the room are a signal generator and a power amplifier linked to the capacitors, which together with the copper pipe produce quasistatic cavity resonance (QSCR), the process behind the wireless power transfer technology.