Quite right, I mistyped. I meant to say a broad shift to all-electric vehicles, not hybrids. Although the argument could still apply if plug-in hybrids ever became very popular, which could conceivably happen rather quickly, say, if the cost of battery technology quickly came down in price, making them cost competitive with gasoline-powered cars. Or, say, gasoline prices skyrocketed again and recharging at home made more financial sense than burning gasoline to charge the battery.