Personally I do get the point
and I think it's a bad idea. I really don't care if I need one or two things to wave around to intentionally pay or have them both sit in my pocket so someone else can swipe me dosh wirelessly. If I pay for something I want the action to be something physical like stuffing a card in a slot and hitting some buttons, or god forbid, handing over actual cash. The latter has the upside of not generating a paper trail that can last for the better part of a decade, outside of my control.
That privacy aspect alone means all current electronic payment systems fail. Fix that and we can talk. And keep the user friendlyness in mind. Like, require a phyical action to pay so swiping by some passing crook won't work. Oh, and make your protocols a bit more solid than the EMV industry swiss cheese standard crap, thanks.