Americans feel the chill as Detroit Show loses its lustre

US manufacturers are being eclipsed on home turf, while attention switches to Vegas tech exhibition

Oh how the car world is changing. Only a couple of decades ago, the annual Detroit Auto Show was seen as the unofficial start of the automotive calendar. Led by the ‘Big Three’ American car makers (General Motors, Ford and Chrysler), the US show was glamorous, glitzy and packed with shiny new models the world had never seen before.

Today, we usually know all about the cars that debut before the covers are ...