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I await the GFETD (Geezer focussed energy tranfer device) with interest :-)
Ahem! Anyway, isn't it just a question of how "lossy" (no - not lousy) these things are. They may not be all that effective at transferring energy, but that might be OK as long as they don't go coupling a lot of energy into places where energy should not go.The current (npi) situation may be worse in the US than it is in the UK. Power outlets in the UK have switches, so people may be inclined to switch inactive power supplies and chargers off. In the US, there are no switches, so you have to pull the thing out of the socket to turn it off, and people being what they are, tend not to do that, so at any point in time there are lots of transformers and PSU's idling and wasting energy.
That brings up an interesting question. If these things don't dissipate energy when it's not needed, what keeps current transformers from having a load-detector in them and cutting power down to a trickle when there's no load? Is there some technical reason you can't do this, or is it just not worth the cost vs. the savings to consumers?
Hmm, oscillating magnetic fields do radiate, it's just that the field falls off as roughly the inverse cube so quite rapidly.
It's complicated, but basically power and efficiency and distance are interrelated, but if you're getting 50% losses you'll probably get about 50% less power at the receiver or perhaps a bit less; most of the rest goes as resistive losses.