The video show the prototype Tx demonstrated by Philips. It is a 3-coil Tx that can power any currently shipping Qi receiver at distance from 0 to 30 mm.
In the video you see the Tx transmit power through a 28 mm thick piece of wood, taken from an IKEA kitchen top. You also see it operate as a classic Qi transmitter with the receiver directly on top of the Tx.
The phones in the video are:
- Nokia 920
- Nexus 7
- Nexus 5
- iPhone 5 with sleeve
These phones and backcovers/sleeves were not modified. They operate as normal Qi v1.1 compliant receivers.
The resonant extension of the Qi specification has the following goals:
- Charge Qi phones over a distances up to 50 mm
- Charge multiple Qi phones concurrently using a single inverter