Our generation’s coming of car-buying age should be a cause for hope as automakers look toward an uncertain future. There were 63 million Americans between the ages of 10 and 24 in 2007, according to an estimate from the Census Bureau. But we are a generation uncomfortable with our parents’ transportation, survey-takers and market-researchers say. Automakers know that. The vehicles on display at the North American International Auto Show are smaller, more efficient and more connected than they were even a year ago. Here’s what some companies are doing to catch your eye.