What happens when you mash up 3D printing and Amazon’s same-day delivery?

http://www.washingtonpost.com/blogs/the-switch/wp/2013/08/29/what-happens-when-you-mash-up-3d-printing-and-amazons-same-day-delivery/
Amazon has sunk $13.9 billion into local warehouses since 2010 in an effort to make shipping times ever shorter. 3D printing could allow it to cut out an entire leg of the shipping process.