Every action my brain takes is made of two components: (1) the desired outcome of the thought, and (2) the computation required to achieve that outcome. No matter how well computers can solve for 2, I have no idea how they'd manage solving for 1. This is because in order to think at all, I have to have a desire to think that thought, and that is a function of me being an organism that wants to live, eat, sleep, etc.
So for me, I just wonder how we're going to replicate volition itself. That's a vastly different, and vastly more complicated, problem.