It's a distinctly American trait to want what's next-even before it's here. Yes, Americans are spoiled, with too many choices in every genre of product, especially cars. But so what? This is the place where cars blossomed, where the first (and arguably best) car culture still exists. And where we haven't stopped loving-and lusting after-the cool car around the next bend. With that in mind, here's PM's calendar of…