Why eat these meatless versions? There are ethical concerns about killing animals, but beyond that there are very real environmental concerns about the resources needed to create beef. As countries become more prosperous the per capita meat consumption skyrockets. Is it a problem if 1 billion people eat a crapload of meat? Not nearly as big a problem as 7 billion.
Personally I eat meat and love it, but I would love to see environmentally friendly synthetic forms that actually taste like meat.