Natanael
If it's a box/home easily reachable from the road, not much. In places with bad road infrastructure, it can save a fair amount of time
Or you'd have to 3D map your own local environment and keep it updated so the drones know where obstacles are when entering your property's airspace
Are the mothership drones blimp types?
In all of the above, where either the landlord or the recipient specifies (and when it's decided by the landlord, the buyer gets precise location info to pass to Amazon when buying stuff, which would include instructions for how to retrieve it after delivery)
In all cases the property owner would be responsible for ensuring there's a suitable landing location. Preferably combined with lockboxes which drones can directly deposit packages to.
I agree with the others that aerial drones is usually not the most efficient. But in some cases the destination is complicated to reach by foot and then they're useful. Otherwise land based drones could easily be used (imagine a Segway style delivery bot!)
Solid state batteries could provide another boost in capacity. Other than that, drones don't need to be quadcopter style only, gliders can reduce battery load significantly (and you could even make a hybrid that can switch to quad mode for precise flight)
Unless they crash when delivering them
It can't be allowed to fly too close to people, and there's also concerns with interfere, collisions, animals, etc
As per xkcd, dev testing would return the response "could not reproduce"
That's why they all try to buy each other
alerted
"you're too good of a deal, change or else"
Also this is why unicode has codepoints signifying where to switch between right to left and left to right writing, so that letters can be correctly written "forwards" in the underlying file format (first letter written first) for both writing systems and also rendered correctly for both writing systems on display