It's no secret that concept cars, which automakers demonstrate at exhibitions, often, perhaps even more often than it would be desirable, are just bold experiments, a kind of exercises in skill, which are conducted by designers and engineers, or even marketers.
However, sometimes there are special concepts that really predetermine the future, not just the future of a particular model, but the future of the entire lineup and in general - the future of the entire company. One of such concepts was Cadillac Voyage. It was so cool that it became a turning point in the whole history of Cadillac brand and General Motors concern as a whole.