Shopping Carts Go Wi-Fi

agentk writes "The Boston Globe reports today that area supermarket Stop & Shop is adding computers with Bluetooth barcode scanners, 802.11 networking and infrared positional sensors to shopping carts in one of its stores. 'The Shopping Buddy automatically displays which aisle you're in, what's on sale there, and what you bought the last time you strolled through.' Most Stop & Shop stores already have automated self-checkout lanes. Is this the future of shopping? What will the impact be on privacy, the cash economy, and the experience of shopping in general?"