NEW ORLEANS — The time, effort, design and research and development that go into developing new food products mean one thing: Manufacturers can’t rely on only knowing what consumers want today. “The future is really getting to a place of knowing what they want before they have to ask for it,” Tiana Holt, a principal at Faith Popcorn’s BrainReserve said during a panel at the Institute of Food Technologists conference on Monday. “By the time I have to ask, it’s already too late.”