Enough with the cards already...

All you 'Big Brother Conspiracy' types can go compare notes with the 'Book of Revelationist Mark of the Beasties', but I'm actually looking forward to the day when I get to wear or am implanted with some kind of device that allows me to ditch the wheelbarrow full of credit, discount, ID, air miles, frequent buyer's club, health, insurance, license, marriage, birth certificate, bank, union, movie club, burger joint, book club, traveller's discount, shoe merchant and airline cards. There are so many cards now that you need to drag around, that some merchants have dispensed with cards and switched to keytags. What's next? Charm bracelets with club member tokens? Club member piercings? Tattoos?