Rockville, Md. — What could be said 20 years ago is even truer today: The U.S. food retailing business has never been more competitive. According to The Future of Food Retailing: Value Grocery Shopping in the U.S., a brand new report by market research firm Packaged Facts, there are a number of trends that are putting pressure on food retailers of all stripes, from supermarkets whose bread and butter is groceries to supercenters and drugstores for which food is a smaller but still crucial part of the product mix.