It's clear that there's enough interest in this and enough people think this is a good idea that there will at least be some small market of products like this long term. I think that's not really a debate.
However, what I am incredibly interested in is why this is so polarizing? It seems like people either go "hmm, yeah, okay, yes" or "OMG NO". Why?
While I probably would not have predicted it a priori, it is in-retrospect-not-surprising that people have more visceral reactions to food than to many other things.
Rob Rhinehart's food replacement Soylent now has a crowdfunding campaign.
If you're interested in one or more of these benefits, send in some money! There is also a new blog post.