True, we still don't know how "learning" works in brains. But it works in our neuronal network. What about combining some real neuronal cells with technology?

True, we still don't know how "learning" works in brains. But it works in our neuronal network. What about combining some real neuronal cells with technology? I remember one documentary in Discovery Channel, where some scientists make use of rat brain cells cultured on a circuit to build a small robot, which learns to avoid obstacles on it's path. A similar video is here -https://www.youtube.com/watch?v=1-0eZytv6Qk https://www.youtube.com/watch?v=1-0eZytv6Qk.