Shakespeare once described the "seven ages" of a person's life. Clearly, he wasn't a car guy. For when it comes to the sheet metal in the driveway, there are actually just five stages of life and, thanks to new technology, each is poised for a dramatic makeover. From more powerful and efficient engines to voice recognition and Web access, automakers are introducing innovations designed to appeal to a variety of tastes. Here's what's coming to a driveway near you, next year and beyond.