If you download a LOT of old movies onto your PC, a truck full of old tapes heading towards you, could be a great internet speed up from your perspective. Or a pizza delivering man, he could bring you some files in less time than the email. At least in principle, some "station wagons full of tapes", cargo planes in the sky full of USB flash drives and pedestrians running on the streets with a massive data storage devices in their bags - they all together could increase the network bandwidth we need.