Technically, you could already do a mid-drive refuel on your own. Set your cruise control, take a gas can, climb out the rear window near the fuel door, realize you forgot to flip the switch that opens the fuel door, go back in the car and pull the switch, double check to ensure that you're still tracking true in the lanes, climb out the window again, unscrew the filler cap, insert nozzle, pour 2 gallons of fuel into the tank, discard the used gas can, pull another gas can from the back seat, empty the contents into the fuel tank and discard (you may need to repeat this step between 4 and 25 times depending on the size of your tank), screw the lid back on, reenter the car, disengage cruise control, realize that cruise control is fucking awesome and turn it back on, and take yourself a well-deserved nap; you've earned it. Shit, by the time you do that, you've probably already overshot your destination by several dozen miles. But totally worth it for the convenience.