Efficiency is king
Reach claims that its system is capable of delivering up to 50W to devices at distances of about 30 feet (9.1 meters), although the power delivered will depend on the size of the Reach router, the size of the target device, and the distance between them.
But at what efficiency? Even with beam-forming, what happens to the distance squared laws? Can we really justify millions or billions of devices that don't come close to the efficiency of a bit of copper wire?