In these stores of the future, you grab stuff and leave

Until this fall, Chintan Maniar managed nearly 200 employees at a Target store in San Jose, California. Now, after 20 years at the big-box retailer, he manages a much tinier storefront in San Francisco. It's staffed by many more cameras than people, and shoppers can walk in, grab a bag of Doritos or a pump-bottle of Mrs. Meyer's Clean Day hand soap, and just walk out. Standard Store, operated by a San Francisco-based startup called Standard Cognition, is open to the public and meant to showcase the company's autonomous checkout technology. When you enter, you use an app to check in.