I wonder how you could do it without seeing some pretty big losses. Wireless charging is already pretty lossy, Dynamic coils though? I mean, I guess you could do it mechanically, but that would still result in less than ideal coils and a noisy device.

If you did it through transistors, somehow, then you'd end up with a lot of loss at each transistor. Too few and you don't make a good field. Too many and the losses would be really high. The cost would be crazy as well. For the transistor approach, I don't know, maybe a big silicon wafer? Maybe just a load of transistors and wires. Who knows.