TNBT: imagine artificial meat made with nanobots that mimic the texture and taste of food, woven into the fibers of real food. And you can select exactly how many calories you want your meal to contain while having your meal experience stay exactly the same. And the nanobots would be recyclable, cutting the energy requirements to produce "real" food. Yes the idea of recycling what you put in your mouth sounds disgusting, but don't worry by the time we invent this, our values would have moved on.