While it's true that a smart grid environment could provide additional benefits, the major benefit of electric cars is, and will continue to be, the increased e

While it's true that a smart grid environment could provide additional benefits, the major benefit of electric cars is, and will continue to be, the increased energy efficiency on a personal level. The biggest problem with renewables is that they're less convenient. Gas is an extremely convenient energy storage mechanism. You put it in a tank, and it stays in a more or less usable state for decades. We don't have usable batteries that do that yet (Edison NiFe batteries notwithstanding).