"one click"

I noticed this NYT article that couched the Payment WG's spec as being
about "one click" : 
http://www.nytimes.com/2016/09/26/business/dealbook/what-if-one-click-buying-were-internetwide.html?_r=0

It's not actually possible to do one click shopping on a merchant's site
securely.  You need interactions with the payment mediator and payment
app.

Interestingly, there is actually a way to do one click shopping though
if you move the buy button off the merchant's site entirely and into the
browser itself.  If a merchant sends a contract, then you display the
payment mediator, shipping address information, and payment app in an
overlay window separate from the merchant controlled window.  This
contains a buy button, so the user can verify information like shipping
visually, and push buy without necessarily changing anything.

Just though that was funny,
Jeff