Actually, if it were like a drone, you haul you power pack to your home, plug it and you can even own a few power packs (lets says the size of a car battery for a ski). You insert the power pack under the seat and it gives you, lets say, one hour of riding time (about the same as a gas tank). You could even have two power packs in lieu of a 15 gallons gas tank.
If you are in a hurry and a big rider, for 500$ bucks (I believe), you can have a 240 V plug in your home and in a few hours, you are fully charged. As I said, you could also own a few power packs.
Of course, hauling a gas can is still easier today. But in the long term, I believe electricity will win over petroleum. Or there is another clean alternative: hydrogen fuel cell.
Benji.