1. Controlled by in app credentials ie calls security or police of minor takes beer. (Could be in a locked case that dispenses item only if you meet requirements) 2. Also controlled in App If you are talking about your wife or kids and yourself grabbing different things you will just designate you are shopping for so and so... 3. They will use it the same way they do now. 4. Maybe they'll have a machine that you can put cash into to get a shopping code for the App Or a self checkout slow lane for the few people with cash? 5.The smart phone part does not apply here. But the Amazon App only makes sense to use at the Amazon store. You are not being Paid by Amazon and FORCED to spend your pay to buy thing in their store. 6.Who says you cant come in and browse just don't take anything. 7. If your phone dies the last thing you took off the shelf is the last thing you will be charged for. YOU will have to police yourself and KNOW if you take anything else it will be stealing. Since the app communicates with the cloud/store if you turn off your phone on purpose it will know and it will call security or the police.