The biggest advantage of this technology is not reducing labor cost. The Amazon Go stores have lots of employees inside the stores doing different things. It's about increasing traffic. How many times you went inside a store and left after seeing a long line?

It can have other benefits like stealing alerts or whatever, but those I think minor. One problem I see is that Amazon is a retailer so many of the potential customers for this would be reluctant to do business with a major competitor. I'm still waiting for this to be implemented in WF.