Lets throw out the security worry, Apple puts energy into the positive side of efficiency and customer experience.
Apple Store Self-Check Out: Shopping, Perfected
Lets think why this is a good idea. Customers like it. Customers love it. Saves store operating costs reducing the need for certain check out transactions. CSA's - Customer service agents can spend time really helping customers. Reduction in space for check out stations. Fast service initiated by the customer, wow! Apple blurs the online relationship with the store relationship.
What about security? Does apple lose items out of there front door. Yes. For the fool who believes there is no loss will be out of business. But, I dont believe Apple is not aware of the cost to implement this gregatious idea. I do believe though that the customer experience and value being created along with the savings of not having to ring up simple items with operating savings, this new method of self-service is a winner.
The future of the store and web are as one. Be BRAVO!