The huge benefit will be when this is used in conjunction with the self parking system. You drive up to the front of your house, get out, and the car drives itself into the garage and plugs itself in.
I completely agree. I came here to say this but see you beat me to it! I might add that this could be used to park your car miles from where you live. You would simply let your car know when to pick you up and it would come to you like calling the valet at a hotel before heading out. If tesla had overnight parking garages/chargers scattered around we could use all that garage space in our houses for more activities!
That's a really interesting thought once you consider where autonomous vehicles are going with Uber and Google's self-driving vehicles.
It makes a ton of sense that any such vehicle, in addition to going to pick you up, drive you around and drop you off needs to be able to park itself at home base and refuel in an automated fashion.
I'd always seen electric vehicles and fully autonomous vehicles as synergistic technologies for this reason. Certainly, in the part of town where I live, no one has garages or even driveways, so electric cars as they stand would not be practical here.