3D representations can enhance the efficiency of robot learning beyond imitation tasks by providing a more comprehensive and detailed understanding of the environment. The use of 3D visual representations allows robots to perceive spatial relationships, object shapes, and sizes more accurately compared to traditional 2D images or depth maps. This enhanced perception can lead to better decision-making in complex manipulation tasks, navigation in dynamic environments, and interaction with objects in real-world scenarios. Additionally, 3D representations enable robots to generalize across different viewpoints, appearances, and instances more effectively, improving their adaptability and robustness in various settings.