While we're not quite scanning retinas à la Mission Impossible and Minority Report, PayPal is now testing face verification for mobile-payment transactions.
The ecommerce company's app has a tab labeled "Local," which helps users find nearby stores and restaurants that accept mobile PayPal payments. Once customers check in to a venue online, their name and photo appear on the store's PayPal app. Shoppers can then use the app to pay for items (cashiers complete the transaction by clicking on their profile pic).