Great technologies often get the hype, but often wind up not going anywhere. Take night vision. First introduced in the 2000 Cadillac Deville, it ranked third in a list of the automotive features consumers crave most, according to a recent J.D. Powers study. When night vision's market price ($1,800) was revealed, though, the technology plummeted to number 19. Consumers may think it's cool, but clearly aren't willing to vote with their checkbooks.