Question: As Amazon continues to refine and optimize its logistics will the delta in delivery time between prime and non-prime remain valued as it is today? My

Question: As Amazon continues to refine and optimize its logistics will the delta in delivery time between prime and non-prime remain valued as it is today? My thought is that the hyper competitive retail marketplace will demand continued optimization in pick-pack-ship and delivery. Amazon will need to add other value to the $100 Prime subscription for it to remain differentiated.