3D printing, robotics, Cad/cam = end of UAW. Small shops can make custom cars all over now, no need for big manufacturing plants. A guy with a big garage can make custom engines with automatic 5 axis milling machines, etc. Yes the paradigm is changing allowing for decentralization of assembly of automobiles.
Where I see this having a near future payoff is where they print the battery for the electrics into the body as they print the vehicle.
it would lead to decentralization of manufacturing, where a small company could order a standardized engine from one place, transmission from another, frame, body, etc and just put them together like I've custom-assembled a PC.