The overwhelming majority of all neurons in our body are just for controlling movement. Ironically, things like language or creativity require very little of our computing power and might be replicated by machine learning and a sufficiently beefy computer. But complex motor tasks? We're way ahead of our current tech on that.
Yeap, I work in prosthetics and have to explain to "futurologist" on the internet that we're never going to see advanced prosthetics that are as functional as your original limbs partly for this reason.