Practically speaking, if we ever want to do serious space travel, this tech is necessary.
O'rrly?
First, the poop steak is based on sewage mud that's dependant on a lot of other conditions other than simple human feces availability. In particular lots of available oxygen for those bacterias to do their work. Oxygen is much harder to store in big amounts than food.
Second, there's other alternatives:
-Hibernation technology.
-Garden in space wich works as a closed systems naturally recycling everything, which does take care of the oxygen problem.
-Transfering minds into machines. Granted very futuristic, but at the crawl speed that space exploration has fallen into in the last years, and the speed of computer advances, my bet is that we'll sooner have super smart machines than any kind of serious space travel. Fully automatized probes are all the rage now baby!
Granted, this looks like precisely the kind of thing that would be used once space colonies are stablished and people start going to them in big numbers.
As for here on Earth, the markets already do us eat all kind of sickening stuff (chewing gum is basically rubber, more syntehtic drugs out there that you can shake a stick at). So if they can get it cheap enough, a little marketing will put lots of people literally eating poop in no time.
Emphasis in "if". If the first prototype is ten-twenty times as expensive as the real deal, and considering they'll soon be competing against genetically modificated animals, well, geting it cheaper won't be easy.
