Well only time will tell if the drones work or don't.
As for Amazon not being around for a long time. Bezos is just blowing smoke up peoples anus. The barrier of entry to start a business like Amazon is not a few million and Bezo's knows this.
IMO Amazon will be around for long time. Amazons uses most brick and mortar business as a showcase Amazon products. Those brick and mortar stores have high operating costs compared to Amazon warehouses. Sunday 12/1/2013 consumers visited Best Buy, Macys, Frys, Bass Pro Shops, BootBarn, etc, and window shopped, They went home found those items on Amazon placed them on their wishlist. Currently it's Cyber Monday 12/2/2013 those customers are now online at Amazon's website and purchased those items on their wish lists and looking for other bargains. Amazon warehouse employees are getting slammed finding those merchandise. By Wednesday UPS/FEDEX/USPS/LASERSHIP it will our turn to get slammed to get those Amazon packages out for final delivery.
With the internet no sales tax advantage soon disappearing Amazons big advantage will be gone. Most retailers now will price match.
There are many players like Google and Walmart or Apple or Microsoft or a UPS or Facebook who have the billions at their disposal to invest in retail warehousing.
Bezos is a smart guy and he knows many companies could do what his company does. That was his point tonight on 60 minutes.