Hi Nick,
I'm sure you agree that electricity will eventually replace fossil fuels. Naturally, this will require significant improvements in the means of producing the electrical energy, storing this energy, and converting this energy to physical motion.
Some of this technology should eventually transfer from mass-produced land vehicles to air vehicles. But, probably no electric synchropter in our lifetimes.
Best that helicopter manufacturers buy the energy storage and conversion devices from outside sources. Hell, you know better than I that helicopter companies could better spend their limited R & D funding on improving the rotor ( excuse me ~ two rotors
).
P.S. If a dream is a type of storage device, like a battery is, would a dream about Nicole Kidman be a wet battery or a dry one?