In theory, you could install one of these inside a vending machine. If you want to buy a candy bar, the vending machine generates a bitcoin address for you to send funds to and displays it as a QR code.
It could then just watch the mempool for your transaction. Obviously, just watching the mempool exposes the machine to double-spend attack, but maybe there's a tradeoff in cost risk when you don't need to run any internet infrastructure for your vending machine.
Hopefully the satellite signal also carries the current fiat prices.
Posted Using LeoFinance Beta