So they took the wheels out of everything and put them into the floor? Next we must do this to our cars & roads. Cars without wheels. And roads with wheels.
Trains would be better for that. The cool thing about cars is that you can actually take them and drive them over more than just roads. If you make cars that are completely dependent on roads and that can't be independently driven, then you just have small shitty trains. Plus it would be expensive as hell, since the wheels in this video aren't, and don't need to be, attached to an engine, but if you want cars to be moving, you'd have to make sure you can transmit power to every wheel on the road at the exact moment a car goes over it
A loop wheel of side way stack of wheels, full 2D motion, this is something we did in mini size motiring , to make a walk plat form for a physical feel 3D vr render.