I keep hearing noise (on various urban planning sites - at least the ones that don't suggest getting rid of cars entirely) about how whenever a municipality digs up a street for road work, they should install a tube going down the length of the street for electricity/phone/cable/Internet/any future uses that might require wires in the future. I know of no municipalities that actually do this.

It seems like this is a common-sense solution to that problem. The cost of digging, drilling, and laying building materials is centralized with the municipality that owns the land, who can coordinate maintenance and future drilling with street maintenance that they need to do anyway. It's future proof - if someone invents a great new communication/energy/electromagnetic technology in the future, the last-mile infrastructure to deliver it to residences is already there. New telecom providers need only run wires, a task they already have to do. They don't do digging or have the opportunity to clip each others' wires. It encourages competition.