Now that we have GPS and relatively cheap UAVs, today’s invention is to unite these technologies to provide peer-to-peer package post.
Fire up your personal UAV quadricopter, and supply it with your friend’s address. Attach a package and the UAV will travel straight to the target postcode using GPS (avoiding trees, buildings and paragliders).
On nearing the destination, it will detect the wifi generated by the recipient’s hub and travel along a line of increasing signal strength until it messages the receiver who will emerge to collect the package.