I really do hope this is the future of payment. But, obviously Apple can't get the whole world and all its devices to use Apple Pay meaning that Google and other brands are gonna have to come up with their own 'Pay' system. Even then, would those other systems be as secure as Apple Pay? God forbid Samsung half arsed something like that and creates something really unstable and insecure - I would never trust Samsung with my payment details!
That all being said, I'm hoping people on other OSes will see us iPhone uses using our phone to pay and they'll want to jump ship!

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Me too. But I think I heard it was something to do with agreements with Visa and other card companies. The bank has to give Apple a cut of each transaction made via Apple Pay and a few aren't too happy about that. I'm really hoping it doesn't take too long to get to us here in the UK because I can't wait to try it out!