By Bezos' own admission, the technology that would enable electric-powered 'octocopters' to fly to pre-programmed addresses unaided by humans is still early in development, and the United States is not likely to establish rules for civilian unmanned aircraft systems until 2015 at the earliest.
On top of that, the idea faces privacy concerns and was derided by some as merely a publicity stunt.
"I know this looks like science fiction. It's not," Bezos told Charlie Rose on CBS News' "60 Minutes" show on Sunday night, demonstrating video of a buzzing, toy-sized chopper delicately dropping a small package on a customer's patio.
The piece was aired on the eve of "Cyber Monday," one of the busiest online shopping days of the year when it helps Amazon to be on the minds of customers.
Dubbed "Prime Air" by Amazon, the vehicles could be used to deliver packages up to 5 lbs (2.3 kg) in less than 30 minutes within a 10-mile (16-km) radius of Amazon's so-called fulfillment centers, said Bezos.
"This is still years away... I don't want anyone to think this is just around the corner," said Bezos on "60 Minutes," acknowledging that the technology needs years of work, and the US Federal Aviation Administration won't likely have rules on unmanned vehicles until 2015 at the earliest.
But Bezos - renowned for his patience on long-term projects - said he was optimistic on making it a reality sooner rather than later.
"Could it be four, five years? I think so. It will work, and it will happen, and it's going to be a lot of fun," added Bezos.
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