Can Tesla Backflow The Power Grid In The Near Future?

Can a self-driving car be useful in the aspect of becoming a backflow of power to a grid solution? In the video right after the break, the duo presenters like to think so as they profess Tesla could have huge fleets of robotaxi cars frequently charging up the grid and earning Tesla the bucks on the side. In such a scenario, Tesla could be doing both things such as selling extremely expensive cars to the rich while providing robotaxi cars to the everyday people while earning real money on the side as these robotaxi cars would charge up the grid when idling. What do you think?