Invincible Iron Man, Extremis, and Transhumanism- Becoming more than human, but less than heroic?

Invincible Iron Man, Extremis, and Transhumanism- Becoming more than human, but less than heroic? | SFTC: "OK, so they took the trailer for The Dark Knight Rises and added helicopters shooting missiles.  We don’t care.  Robert Downey Jr. is the best thing to happen to Iron Man since titanium underwear, and after stealing every scene in The Avengers, we’re ready for more Iron Man.  Especially since, according to the ever reliable Wikipedia, this Iron Man movie will be based on the “Extremis” storyline, which will pit Tony Stark against both his own limitations and the temptation of gaining more power at the cost of his humanity.  He will face the philosophical dilemma of when, exactly, one becomes so advanced technologically that one is no longer human, a problem known, in philosophical circles, as transhumanism."