[zobzu]

Actually landing UAVs is far harder than automatically parking a car. The driving vs flying after take off is what is easier. Landing and take off.. nope.

Note that drone could mean a car in this case. UAV being an unmanned aerial vehicule.

[baddox]

With a modest infrastructure of marked landing pads on roofs, I think UAV landings are easier than automated car parking. If you're expecting delivery UAVs to fly under the tree line along sidewalks and yards to land directly on a residential porch, then yes, that's extremely difficult. But I highly doubt that this is a remotely feasible plan within a decade or so.