From the article. Seems like Amazon has more than just their own stuff in mind:
Amazon started a UPS-like parcel service in the U.K. last year, but abandoned a similar effort in the U.S. amid the surge in online orders. Much of Wall Street believes Amazon will eventually fly packages for other companies to defray investments in Amazon Air and generate new revenue streams, much the way it did with other logistics services and its cloud-computing division.
“I absolutely expect them to pick that up again,’’ says Ravi Shanker, a Morgan Stanley logistics and transportation analyst.
But for now, Amazon Air ships items already in its warehouses, typically bound for customers.