This sounds like quite the Rube Goldberg machine; if it becomes a reality and is economical, that's great news.

I have to think there is lower hanging fruit in the fast food industry, though. I just really want McDonald's or Dunkin Donuts to turn their POS machine around so I can key in my own order, or maybe they could cut a deal with Amazon or Apple to start using Siri or Alexa. The failure rate on the biological natural language processors currently in use are shockingly high.