Electric can fly a combat plane competitively, for about a minute and a half. When they double the watt-hours/lb again in the battery it will be pretty close.
It will require custom built motors, probably with a 1/4 in. titanium shaft. They'll probably have to be either an in-runner style, or someone will have to figure out how to machine pockets into the inside of the can for an outrunner to contain the magnets. I wouldn't be surprised to see aluminum wire either, despite the resistive losses. The battery will have double the capacity for the same weight Li-po, and deliver 150 amps.