[hsshah]

Card case is elegant and innovative. As a user, I love it. However, calling this a harbinger of end of credit cards is jumping the gun. If that would have been easy, PayPal would have already ended credit cards (for online purchases). I see no signs of that.

A completely different set of competency and technology will be required to replace the credit cards with their own payment solution (credit risk assessment, fraud prevention etc). Their impressive track record so far means they can certainly develop these; but it won't be that quick or easy.