The NRF’s expo and convention, which has drawn thousands of retail industry professionals to New York this week, has been heavy on demonstrations and discussions of similarly-minded attempts to drum up bigger sales by catering to newly-emerging shopping preferences or with new technologies. Snacking giant Hershey, for example, said Sunday that it has tested an in-store display that incorporates facial emotion recognition technology. When shoppers smile, they’re dispensed a free piece of chocolate. (And sorry, chocolate lovers, the technology is able to recognize when you try to come back for seconds.) Read more at The Washington Post.