A fast food restaurant could adjust their pricing based not on time of day, but on which customers are looking at the board.<p>It could be based on individual unique identity (from facerec, and the umpteen ways a smartphone sells out the user), and/or on factors they can pick up from cameras alone (like gender, ethnicity, age, style of dress, class).<p>From there, you can learn price tolerances, including how price affects repeat visits.<p>Hook it into promotions, loyalty programs, etc.<p>For extra dystopia, if there's any demographic you'd rather not have in a particular store, you can discourage them with pricing.<p>If someone gets better pricing than you, it must be an algorithmic oddity, or they they got better promo rewards from retweeting a post, or their (upcoming) AR glasses outward-facing ads display got better impressions, or something.<p>"Sir, this is a Wendy's... halt, and submit to AI socio-biometric scanning, citizen!"