Pickup trucks have a very simple concept: A more rugged vehicle with a long, open cargo area designed to haul various heavy loads, certainly heavier than most normal cars could manage. Classic pickup trucks didn't have much in the way of comfort features or refinement. Over time, however, automakers started exploring various ways to take them to the next level. Sometimes that meant tackling even rougher stuff, outfitting them with a smattering of luxury features, or making them fast enough to outrun some of the best performance cars.