I have the feeling that, if this sort of idea was as value as the article implies, McDonalds (or Burger King, or any other big chain) would have put serious money into developing this sort of thing and it would already be everywhere.
(I wish there was a website or publication that took businesses and profiled how they work, the challenges they face and the costs associated with parts of the business consumers might not understand, so these sort of questions were easy to answer. I would love to read how McDonalds works (as a business))