@SinerAthin
Actually what you are saying is essentially the same as I did but you're emphasising more on genetic aspect. I think both genetic engineering and producing actual organs would be used mutually. in the future We will be able to make our own organs even better. For example our skin can be designed to be more resistant to hostile enviroment or enhanced eyes with night vision and thermal detector , brain with kind of bio-chips attached who can help us calculate things much faster ! these body and physical enhancements plus altering our genetics would lead to a much more advanced humans that have higher flexibility as well as nearly immortal.
However ,Unlike many of you I stongly belive these things will happen within less than a millenia (perhaps in 5 centuries). my question is what will happen beyond that? (ofcourse This is all gonna happen by considering that our technological advancements would not be slowed-hampered in any ways)