Our ability to "upgrade" the bodies of soldiers through drugs, implants, and exoskeletons may be upending the ethical norms of war as we've understood them.
If we can engineer a soldier who can resist torture, would it still be wrong to torture this person with the usual methods? Starvation and sleep deprivation won't affect a super-soldier who doesn't need to sleep or eat. Beatings and electric shocks won't break someone who can't feel pain or fear like we do. This isn't a comic-book story, but plausible scenarios based on actual military projects today.
In the next generation, our warfighters may be able to eat grass,communicate telepathically,resist stress, climb walls like a lizard, and much more. Impossible? We only need to look at nature for proofs of concept. For instance, dolphins don't sleep (or they'd drown); Alaskan sled-dogs can run for days without rest or food; bats navigate with echolocation; and goats will eat pretty much anything. Find out how they work, and maybe we can replicate that in humans.