The fact that at least 3 people in this thread have named the category "meal replacements" but not a single one has named a specific product I would know by name (non dieting!) seems to me a pretty clear indictment that this category is not as established as you are suggesting.
While I'd generally agree with you, you can look up any "meal replacement" shakes made for athletes that are used to add calories. They contain a large amount of protein and calories and are fairly well established. MET-Rx Meal Replacement is one of the larger SKUs on the market, but there are many others.
