Another thought on a food pill.
While it would be a shame to lose the social and emotional aspect of food, I think a food pill would do fairly well in today's society. With everything being so fast paced nowadays, many people (not all people) would jump on the chance to skip breakfast, lunch and dinner to work. This would also be good for people who were sick and had a hard time keeping down a whole meal. If it could be made cheaply, it could even help fight hunger in the world. While a pill that replaces a meal would not be good in all situations, I would definately enjoy the simplicity and ease of a pill every now and then.