Amazon's doing a 'just pick up and go' grocery thing.

https://arstechnica.com/information-technology/2017/04/how-amazon-go-probably-makes-just-walk-out-groceries-a-reality/

Yeah, it looks convenient, but all I can think of is how much data they'll collect on the schmucks who patronize it - and how much psychological trickery this will enable to manipulate their customers.

I wouldn't trust it.