Mobile applications like pointed to the future with their bar code scanning/price comparison technology. Though not quite ready for prime time, you could see how these apps would fundamentally change the retail experience by putting the power of information in the customer’s hands at the point of purchase. See it in action:

Google has brought the future home by optimizing their product search for use on Android and iPhones, making it easy for customers to read reviews and check prices right now. Is haggling coming back in style?