I just don't understand the need for the concept to be honest
If I reach into my pocket for a phone, I can reach into it for my wallet, where taking some (wait for it) 'cash' out while queuing, has served me well for many a year. Or maybe make a card payment too, as chip n pin isn't slow in my book.
To me it's just mobile makers and networks trying to get in where I don't want them; they give me texts and calls which is lovely, thank you. However I'll go elsewhere to pay for stuff and things.
And for the same reason I've never tried contact less with the abundance of cards I have that take them. I just don't see a compelling reason, unless someone here can tell me what I'm missing?