[p1mrx]

It sounds like "digital electricity" is a more advanced sort of GFCI: instead of verifying that the two pins are carrying equal current, it verifies that the expected amount of power makes it all the way to the receiving end.

Normally, running high voltage through a wire is dangerous because a fault can dump power into the middle of the wire (starting a fire) or into a person (stopping their heart), but perhaps with end-to-end active monitoring, it's possible to operate safely at much higher voltages?

If this technology works, I think it would also be useful for powering a tethered drone from the ground.

[Edit: according to lopmotr's link, they are using this for drones and balloons already.]