Remember when the yellow first-down line was the height of game-time badassery? Details here are scant, but this looks like a trip:

PetaPixel writes,

The system would require a number of high-resolution cameras mounted in various places around the stadium. Each camera is connected to a network and controlled by software. Afterward, the video viewpoints are fed into an image processing engine that turns it into high-resolution 3D spatial data.

[YouTube]