Earlier quoted context omitted.
I don't know why the US hasn't adopted EMV. It's not perfect, but it has cut down fraud massively here in Europe. They're very hard to clone (I won't say impossible, but attacks against EMV have not generally been of this nature) and the transaction records at both ends will tell you whether the actual, real card was there. The liability is more clear-cut as a result. If the customer claims the charge was unauthorise…
As I Canadian I also read this with a little sadness. It's something I have always wanted ... but now someone made it just as we're close to finishing the transition to EMV. It can actually be a bit tricky to use my company card to buy lunch at restaurants sometimes because "there's no chip". Their FAQ says future versions of Coin will support EMV, but I'm not familiar enough with the hardware to know how difficult t…
In theory, you could slam mastercard, visa, amex, credit, debit, whatever else you want, all on the one chip. Depending on the exact card and terminal implementation a transaction would either use the default application or get an on-screen display asking you which you would like to use. But you'd have to get the banks to load the app on there as there are sensitive keys involved.
That's not exactly the same as Coin - you couldn't pre-select which card to use in which situation, and you couldn't load them yourself. I suppose in theory you could have multiple EMV chips on a card like Coin and have a circuit-switching arrangement of some sort. There would need to be a way to embed them there and that would put a limit on things...
--edit-- about the stupid loyalty card things - in Australia I noticed most of them had started working on barcodes, and people had smartphone apps that gave them a menu and displayed the right code, pretty cool.