The North American International Auto Show wasn’t even the world debut for Cadillac’s Provoq fuel cell CUV concept, that honor went to CES in Las Vegas last week. The Detroit show did offer the first chance for a broad section of the population to take a first real look at the Provoq.

General Motors remains extremely excited about the E-Flex architecture that underlies the Provoq, as well as the Opel and Saturn Flextremes; in fact Bob Lutz pointed to the system as one of the high-points of his career.

We’re right there with Lutz in his appreciation for what he calls a “paradigm shift