Where drones are already doing real work
Agriculture was one of the earliest serious commercial uses: drones carrying multispectral cameras fly over fields and generate crop health maps that flag irrigation problems, pest damage, or nutrient deficiencies long before they're visible to the naked eye from the ground, letting farmers spot-treat instead of blanket-spraying. Search and rescue teams use thermal-camera-equipped drones to scan large areas of wilderness or disaster rubble far faster than ground teams on foot, often finding heat signatures human search parties would miss entirely.
Delivery drones, from companies like Zipline (medical supply delivery, especially in regions with weak road infrastructure) and Amazon's Prime Air, are live in limited markets, using GPS waypoint navigation plus obstacle sensing for the final descent. And drone light shows, hundreds or even thousands of drones flying pre-programmed, GPS-synchronized formations to form animated images in the night sky, have become a genuine (if less obviously 'useful') showcase of how precise coordinated multirotor control has become at scale.