A prototype is a requirement here. Seeing the team, I see no technical person, but two brand designers (just the people to make a great demo video). Not to say they don't have someone who can pull this off, but it is a thing that has not been done before exactly. Like Lockitron, Coin, and others before, the variety of physical interfaces involved plus the need for it to work 100% of the time make this non-trivial. This is not just a neat digital interface problem.