I think its just bit exaggerated, I was also working in the field of wireless power transfer and the concept of sending power wirelessly is pretty old. RADARs do it all the time. The main issue with wirless power transfer is the efficiency. Although the author mentions that usage of RADAR is very inefficient he doesnt mention how efficient is the usage of antenna. We can imagine the scenario ourselves. If resonance is to be used then the resonant frequency of both antennas should match and the the emmitting antenna should emit radiation in all directions in order to find the target antenna. So this is already pretty inefficient. Radars can actually steer the beam in any desired direction so the main loss is due to diffraction side lobes but in this case, the whole design is based on initial loss of power. Anyway I could be wrong but thats what my knowledge so far says.