These margins must be destroyed. Soylent, and its competitors, are out to destroy them.
Full meal replacements will only hit critical mass if they cost less than the $7 a day an average American already spends on normal food, and if they are easier to prepare, eat and store. They need to taste nicer too.
The first part is the hardest bit. $6 a day is the current mean cost of full meal replacement production in small batch sizes. Large batch sizes and huge volumes can probably half this cost through economies of scale. Once we have at volume, non-regulated full meal replacements that cost $3 a day, with say a 20-50% gross margin, I expect the entire market to explode.
First one to market wins.