As a software developer by developer by trade, I'm all for advancing technology. And the potential shown by the advances in prosthetics are amazing. I sincerely believe, that should Christ's return be delayed much longer, the day will come when we will have people wishing to remove perfectly healthy body parts to have them replaced with superior mechanical replacements. We are very close already.
Pretty soon, the only thing unrealistic about the "Six Million Dollar Man" will be the price tag ... it won't cost anywhere near $6,000,000.00.
However, mechanical replacements are one thing. When you start messing around with the human genome trying to produce a genuinely mentally superior species ... a "superior race", or "master race" ... well, the pitfalls should be painfully obvious.
I also can't help thinking that if one takes this sort of thing too far, Genesis 11:1 - 9 is going to be replayed all over again.