I would just like to clarify one thing. When I said that there are certain aspects of human intelligence that can't be duplicated, I meant presently, not eternally. I was also pointing out that we are nowhere near such duplication.
As for the Singularity, transhumanism, and all that--while they might come to pass someday (or not), our current levels of knowledge and technology are much too far off from what would be required to convince me we'll achieve something like this in the next 50 years or so.
Maybe in a few hundred, or a thousand, assuming we manage to solve our environmental, resource, and energy problems--and that's a big assumption.