[takeda]

That's the point of this technology - to increase impulse buying.

Credit cards purpose is that it hides from you how much money you have left. If you were paying in cash and see how much money you have left in your wallet, you're more likely end up not purchasing a given item.

This is one step further, since you now don't know how much you're paying (unless you calculating the cost in your head, which most people don't do) and typically you'll know once you get a CC statement.

Note that the kiosk doesn't print the receipt, it e-mails it, which makes it even harder to instantly see what you've paid.

[ajkjk]

Well, that's one of the points. Another point is to not pay for cashiers or have checkout lines.

[asdff]

You won't have to pay for cashiers but you will have to still pay for people stocking, security when people inevitably try and beat this system, customer service for when old people without cellphones get confused, etc. Maybe you shave off one minimum wage worker off your payroll, for the cost of however much amazon licenses this tech to you.

[hamandcheese]

Not to mention all the data to be mined.

[miguelrochefort]

Already mined by all stores.