I could see it being useful in conjunction with a traditional bike light illuminating the terrain further ahead. The grid would give an intuitive picture of the immediate terrain that you sometimes miss when you’re riding at night.
Lumigrids can project a grid onto the ground. On a flat road surface, the grid will consist of standard squares. On a rough road surface, the grids will deform accordingly. By observing the motion and deformation of the grids, the rider can intuitively understand the landforms ahead.