Well, it kind of depends on your definition of marketing. Certainly the CTS is a new product at the center of Cadillac's new image, but what are new car models other than genius marketing-in-disguise with incremental updates to technology? That's not to poo-poo the CTS, but when you strip off the pretty sheetmetal, it's still 'just' four wheels meant to get you where you're going. From a product stand point it's not so different from a BMW, Acura, Lincoln or Chevy. The difference is the feeling evoked by the sharp lines, aggressive stance, and the seductive model they've got driving it. In other words, marketing.
Maybe that's too broad of a definition for this particular thread, but I think it's a good example of how marketing and sales are truly interwoven in everything we touch. Every product on the shelf is designed in this manner, to make consumers want it, or to convince them they need it.