Calculating the energy density of gasoline versus battery is misleading unless you also include the engine, fuel system, radiator, battery, etc. Sure my truck

Calculating the energy density of gasoline versus battery is misleading unless you also include the engine, fuel system, radiator, battery, etc. Sure my truck can hold 120pounds of gasoline but the energy density includes an 800 lb "gasoline to transmission" adapter. Once cars have "iPhone" batteries, gasoline cars will go away. A Nissan Leaf is rated for 3x the energy efficiency of a comparable car. I doubt people will mind giving up gasoline fumes and filling stations. (33khw in gallon of gasoline versus 3.5khw/mile in a Leaf.) I can pedal a bike at 200W for an hour. Isn't this enough to charge 80 iPhones? How is this a useful comparison?