Huh. So I'll have one credit card to carry around that will just pass through the charge to another card I'm carrying around, because none of this stuff is yet reliable enough to abandon my wallet entirely.<p>Sorry for the abrasive skepticism here... it's part of being in the industry. But I see one of two scenarios playing out here:<p>1) Google becomes (buys/owns/works with/...) a proper Issuing Bank giving out real lines of credit for a credit card. They get interchange fees when you use your card, just like any other card issuer. No real value is added to the equation, and it's yet another service that Google offers which becomes a nightmare if you need to speak with a human - which when you're dealing with people's money is quite often. They may have a decently searchable web UI for your transaction history, but so does Mint.<p>2) Google does some clever magic where they authorize one of your cards on file when you swipe your Wallet card, and just pass through the result. Because they still need to act as an issuing bank here, they either raise interchange over the real issuing bank of the actual card (store owner gets screwed), or charge the same or less and eat the loss. Presumably they'll make up this way by creepily using your purchase history.<p>Neither of these scenarios does anything to move retailers closer to NFC adoption (actually useful for Google/Android), and I'm not sure how many people are willing to have some "one card to rule them all" thing going on, which is the only real benefit I see to the consumer here.<p>Having my wallet 3mm thinner isn't enough benefit for me to not pick the best rewards card based on where I'm shopping, never mind the fact that I don't trust Google with my financial data (or, more accurately, I don't see any benefit in giving them access to it)