Free Wings and tilt wings: Free Wing concept, the technology that has been around longer than multicopters just met its new best friend.
This is a demonstration video representing how the ElectraFly uses energy dense fossil fuel to Supplement the low energy density batteries which supply the electric motors. Electric motors that are essential for quick reaction and constant torque. https://youtu.be/1Otlaze0LzI
I don't think gasoline is here to stay, but right now batteries don't pack the punch we need them to for the transportation of the future. The following graph shows the need to supplement electricity with more energy dense fuels. Read more here.