The other (and perhaps more interesting side) of yesterday’s Dash Button announcement is the back-end that makes it work:
Dash Replenishment Service (DRS) enables connected devices to
order physical goods from Amazon when supplies are running low —
like a coffee maker that orders more coffee beans. By using DRS,
device makers are able to leverage Amazon’s authentication and
payment systems, customer service, and fulfillment network —
giving their customers access to Amazon’s low prices, great
selection, and reliable delivery.