Read Nietzsche and Philosophy (Gilles Deleuze) pages 147 to 189 (5-The Overman: Against the Dialectic).
What you're describing fits into the categories Deleuze uses to describe contemporary nihilism. Transcendentalists/utopians would be examples of reactive nihilism, while detached atheists can be described as passive nihilists trying to cope with their sorry state.
As an atheist, I deal with death by hating the whole thing. Of course, Lady Death won't ask for my consent, but I don't see myself accepting its inevitability. It seems absurd to me that beings like us have to die like an amoeba or an amphipod. If there's a chance for immortality within our technophilic grasp, we should seize it.