Multi-spectral is the future of drone sensors. We are already seeing some advanced multi-spectral sensors, and more are sure to follow.
Agriculture is one area where multi-spectral imaging is giving immediate results and is showing even greater promise. A very detailed article speaks of how drones are using sensors that work in the Red, Red-edge, Green and near Infra Red bands to capture imagery in visible and not visible light bands. Seeing fields in this manner gives farmers new insights into the health of their crops.