The best application I've seen for the currently available electric airplanes are flight schools. One plane I looked into has a flight time of 1.5hrs, which is plenty for training. When I last priced out instructor time, 30% of the cost was the fuel. This means that flight schools could cut prices by up to 25% or so. That being said, the plane I looked into was $250k, while a student level ICE plane could be had for $20-50k.