"If gas prices do go under $2 a gallon, well, there would be less excitement about plug-in hybrids," Mr. Detchon admits. "But there's really a lot less concern about gas prices these days – and a lot more about US energy security. That's a big difference from the 1980s. So I think that detaching the US from dependence on Middle Eastern oil will continue to be a concern that will drive policy."