Sprint has developed 2 RFID customer-loyalty card applications:

"The applications use an RFID-enabled loyalty card that can identify a customer as he or she walks through a store. The chip in the loyalty card transmits to a nearby reader when the customer is within 8 feet of the reader, triggering an avatar to appear on a nearby computer screen. The RFID reader identifies the information in the loyalty card and feeds the data to the avatar, which welcomes the customer to the store in an animated fashion."

And here you thought the movie "Minority Report," in which the store walls greet Tom Cruise's character by name, was science fiction.