Take, for example, the order-from-your-seat concept. On the surface, this is a fine idea. Each seat at Wrigley now has a scannable QR code posted at waist level of the occupant. A quick photo brings up a menu with all the usual treats: Cracker Jack, beer, hot dogs. But instead of reaching for a quick 10-spot when the vendor hits your aisle, you have to fumble with a credit card, and you can see added sales tax on your screen, too.