So, I mean, I think the mind and the body are logically distinct phenomena, but that the mind is an epiphenomenon of the body. The mind arises from the body in its environment, the way that the USA arises from an area of land coupled with a set of ongoing social practices of humans.
I'm not down with Platonic dualism -- which I think infects, to its detriment, all this nerd-rapture extropianism -- but nor am I totally comfortable with a default dismissive "eh, all this funky cyborg stuff is never going to happen" attitude which is also common, and which has its roots in another kind of essentialism ("we are only what we look like just now").
I think we never get rid of the body -- its messiness, its limits, its abjectness, its fluidity, its compromised complicity in death and transformation, the way in which it makes a mockery of our will, our ambition, our self-concept. I also think that bodies can look like anything... and that bodies are going to get very weird indeed.
I thought Leckie did a fine job of it. And the novel I just finished is full of people growing up many-bodied. I'll be curious to see what you think of it, if and when.