The real position in play is abstraction over the GRID and selling it back as a viable business model. EV's are transitional technologies on the way to the future. Tesla cars are proof-of-concepts that a future can work without petroleum dependancy. They spotlight those millions of tailpipe emissions which only electric and hydrogen eliminate.
Power markets refuse to invest in the capture of smokestack emissions at source so the exercise Tesla is running remains retail only. When hydrogen competes with electric fuel cells that day will mark petroleum's last tailpipe gasp. Then emissions at the smokestack are all that's left to capture then.
Tesla will be there and in position to sell you power for your business, home or car in whatever form required from an eco-conscious GRID that puts the cost of capture into the end product and puts producer's responsibility back onto the consumer end user.