- Art exhibit celebrates car designers, the auto industry's "rock stars"
- Concept cars on display include Bugatti, Chrysler, Buick, BMW, Cadillac
- Experts wonder if America's love affair with its car culture is fading
- Bizarre cars range from fighter-jet-on-wheels to tiny electric bubble car
Atlanta, Georgia (CNN)Italy has David, Paris has the Mona Lisa and now, Atlanta has the Firebird I XP-21.