Tesla Engineers Are Developing "Solid Metal Snake" Car Chargers
Musk isn't providing any more details about the system as of now, but in the video embedded below (especially 9:15 sec+) from the P85D event, he hints at possibility of such a system. Of course it's very uncool to manually connect the charger to the charging port of your car; especially if you are a Tesla owner. Check out the video -
Source: #-Link-Snipped-# (Twitter)