In the last act of Mission Impossible - Ghost Protocol Hendricks was still alive and was watching Ethan trying to deactivate the bomb and yet does nothing and breathed his last breath once it's deactivated. Why is it so? What does this mean?
I'm not sure he actually was able to do anything else than just lie around. If I remember correctly he fell from a huge height (or rather jumped off himself in order to nobly sacrifice himself for the cause), in order to make the detonator (or whatever it was in particular) unreachable from Ethan for the few seconds that remained.
So I'm sure he wasn't able to move and was already near to death. The will to see his plan succeed was keeping him alive, but once Ethan crushed this plan (Hendricks surely didn't anticipate Ethan's reckless maneuvre with the car) he had no reason to stay alive anymore.