We will soon have self driving cars. When can we have self-fueling vehicles?

I keep thinking that a more valuable invention than self-driving cars would be self-fueling vehicles.

What’s standing in the way of car manufacturers having RFID-based (or other) detectors that can figure out where the gas input is on your car, electronically open the aperture, and mechanically move the hose to fill the tank?

It wouldn’t be all that hard to build in electronic vapor recovery apparatus, and the robotic activity of moving and placing a nozzle can’t be any more difficult than the work robots do on an assembly line.

Auto-filling of gas tanks – that’s something tht everyone could make use of today.