The reason why a pruning robot is actually a really good and important idea is that climbing trees and then holding on with one hand while sawing big heavy bits of them off is incredibly dangerous, with injury rates about 10 times that of working in a factory. This robot can not only perfectly get the job done, but it also protect human from getting hurt. It's able to climb up and down trees with no trouble while cutting branches off in a spiral motion.
At 13 kilograms, the robot can drive straight up trees between 6 and 25 centimeters in diameter at 0.25 m/s, while tackling branches with a diameter of less than 5 cm. It can automatically adapt to a variety of tree morphologies, and is relatively energy efficient since it can support itself passively on the tree by using its own weight to securely grip the trunk.