“Flat is where it’s at.” That was the naked truth Todd Hale, SVP Nielsen, shared with business session attendees of the 2014 GMDC Health, Beauty and Wellness Marketing Conference on Saturday afternoon when identifying the future game-changers in health and beauty. But get ready for a wild ride because the millennial generation, numbering 83 million strong, is about to step into its prime purchasing prowess, noted Maryellen Molyneaux, president of NMI, in a presentation following Hale.