While some of the production vehicles have stolen the show at the North American International Auto Show, there are a number of concepts that have been introduced. The 2012 Detroit Auto Show had several interesting concepts, and there seem to be fewer this year as the production models are more prevalent. Concepts can have a variety of purposes. Some are previews of future models, such as the Ford Atlas Concept – a preview of the next generation F-150. Others are just odd like the X-Truck. See all the 2013 concepts in the gallery below. As before, links will take you to the full article at Autoblog.