With modern advances in body augmentation, DNA manipulation, BioTech, Robotics and computer human interfaces it appears we may soon be modifying humans in a very big way. Some see ethics issues in this as we modify ourselves, will we still be human? Will we be playing God and make mistakes, which are irreversible? If we screw up big time, will we have the ability to change back? Chances are there will be mistakes along such lines, hopefully they will be small ones and hopefully we will pay attention and be careful along the way.
You see soon we will be modifying human life to be better and it will be our choice. You can choose to remain all-human and live a much longer life if you wish. But being all or 100% human maybe considered inferior in the future. But if you are a purist you can make that choice and it should be no problem. And there is no doubt if you do that you will not be alone in your purest views, there will be a huge following, and that is a good thing, CHOICE is always a good thing.
Have you considered how you feel about these things personally? For instance do you want the worlds libraries hooked to a wireless chip mounted on your skull covered up by your scalp? You would be smarter, have instant communication and your brain would have all the world