As I drove up Central Entrance in Duluth I was struck by how many billboards were LED billboards. Those that weren't were often a set of big panels screwed to the supports.
What are all those who pasted up great rolls of paper doing now? The panels are probably placed up in a fraction of the time needed for the rolls of paper. "As for changing [an LED billboard], it's as easy as clicking with a mouse button, rather than sending out a crew to pull down and replace a billboard message." - LED Billboards: Outdoor Advertising in the Video Age
But this kind of change is happening throughout many businesses; jobs are going away because of changes of business practices and technology. They won't be coming back and those who think they will are deluded. We have to change our whole education system to train people to adapt to change.
I don't hold out much hope for this. It was in 1963 that Bob Dylan's "The Times They Are A-changin'" was introduced. In the same era Pete Seeger wrote "Where Have All the Flowers Gone" with the line "When will they ever learn".
The times are are still a-changin' and we still haven't learned.