Grid-Guzzling Hybrids?

Business week just ran a brief story about the potential impact of electric cars on the utility grid.
Shift (foreign) oil demand to (domestic) utilities, then watch the price of gas drop to $1 a gallon... while keeping our U.S. dollars at home. In parallel, focusing on high-density energy storage to increase wind-farm (and even wave-energy) capacity utilization may well match the demand increase - in a renewable fashion.