Wallet Size

While the world of technology follow's Moore's law - , wallet is one area where the size first fell but is increasing now, with never ending list of plastic cards making way into our wallets. There has to be some integrated way to reduce this. May be a single chip which holds all the information, but that again leads to easy theft. Probably no plastic at all is the solution - may be a finger print reader which provides list of cards, that can be used and later asks for passcode for the chosen card. hmmm ... too technical yeah .. but the point is that it is high time to revolutionize the WALLET, after all technology is meant to simplify life not the other way round !