This Kickstarter project wants to turn your iPhone into your wallet:
Geode is an iPhone Appcessory that stores credit cards, loyalty cards, gift cards, and membership cards and protects the information with biometric security. The onboard universal card and e-ink barcode screen means that any card can be stored in the Geode and used anytime, anywhere.
Not only does it secure your personal information, Geode also serves as a protective case for iPhone.
Personally, I don’t want a case on my iPhone. Plus I’d still need a wallet to carry cash and my ID. But that’s just me, and this project looks clever and ambitious to say the least.