VIP members of the Baja Beach Club in Barcelona can choose to have RFID chip implanted in their arm instead of carrying an ID card. The chip is the size of a grain of rice and can be scanned at 10 cm. Drinks can be charged to the users account by scanning the chip.
Will we all soon carry a microchip in our skin instead of a wallet? Before that happens they will have to figure out how privacy rules apply, how an individual can control what gets scanned by different vendors, and develop a standard. Nobody’s going to want 10-15 chips like we have 10-15 cards in our wallet!