From memory Kurzweil argues the hybrid human is already in development. Technological solutions to augment or replace sight and hearing are working today. We've all seen the astonishing success of artificial limbs - the IAAF have already banned augmented humans from competing against non-augmented. http://en.wikipedia.org/wiki/Oscar_Pistorius
I think the main distinction is synthetic versus artificial. We done artificial for a long time, such as artificial hearts. We will however, be able to grow eyes. Regrow hearing organs. Regrow hearts. Regrow livers. Regrow kidneys. Regrow everything.
We are already regrowing functioning rat hearts in Minnesota. Using profusion decellurarization, they take a rat heart and strip it down to the extracellular matrix. They have found a detergent that can do this while allowing the organ "skeleton" to retain all the cytokines and other biomarkers that signal stem cells where they are in the organ, and what they are supposed to turn into. They then infuse the matrix with stem cells, and grow a new heart in a bioreactor. It actually works in rats. I think we will be able to regrow human hearts in 10 years.
I would much rather have my own heart (or eyes or whatever) back rather than a prosthesis. I think most people would agree.
Regarding boosting human cognition, I agree. However, I think this can be done biologically, rather than cybernetically. And a brain computer interface would be nice, but I suspect some sort of a cybernetic middleman would be necessary (unless we can grow an interface organ).
Now if I had an augmented memory I wouldn't have to rely on my poor ole' flesh only model to recall Kurzweil's arguments
Nootropics are in the works!
Here is a good one you probably partake in every day. ;-)
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