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http://www.marketwatch.com/story/drone-delivery-is-already-here-and-it-works-2015-11-30 suggests that a main problem holding back drone deliveries is governmental regulation.
Amazon mentions regulation, but it also says that there is a lot of testing ahead.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.