THE DETROIT AUTO Show circa 2004: Gas prices are low. Auto sales are is good. Bigger is better. The only electrics on the floor are the hybrids brought along by the Japanese automakers like Toyota and Honda. Tesla is a Silicon Valley startup with big ideas, safely ignored. Cars are machines that people buy, own, and drive themselves. Automakers are taking the wraps off their latest machines, talking up power and comfort while the metal gleams in the spotlights.