A friend of mine working as a transport economist produced used modeling and projections to estimate things like traffic congestion, road usage, miles driven and so forth over the next however-many years (this was in the late 90s and the effects were striking -- as in bad). His boss was startled by them and said "what about the effects of the internet and virtualization?" "That's what you're looking at."

A whole lot more stuff is being delivered to people's doors today than twenty years ago.