We are using machines that can follow computer instructions to make things out of plastics and wood. There are many people expanding the technology into other materials.
The computer files that create these objects can be shared easily with the whole world, so something useful only has to be created once.
We are rushing towards a time when one relatively inexpensive machine can produce anything that you request, overnight.
How does that change our entire civilization?
What companies go out of business?
What type of company shoots to the top?