A retroactive Ban would make your DJI Drone illegal to use If the FCC gets that power then its safe to say that all DJI Drones in the U.S. would be grounded.
EDIT: As of DEC.23rd for now only new drones would be banned if the FCC gets the...
The idea was to use a tethered power source as well, allowing extended flight times only limited by weather or base unit power. A balloon is an interesting idea, especially if inflated with self-produced hydrogen. But a balloon is fussy...