Guy Raz talks to Chunka Mui, who co-wrote Billion Dollar Lessons: What You Can Learn from the Most Inexcusable Business Failures of the Last 25 Years, about the successes and failures of companies that present to the public a product that changes from what people are used to. Netflix has withdrawn a plan to mail DVDs to people under a new name. Coke tried to market New Coke. What will the public accept? What won't they? And how do you know it's time to reverse course?