Actually, you're probably right for the time being orleander, but eventually, we'll get to where modification of ourselves with genetics, cybernetics, or nano-tech is an obvious way to improve ourselves for various reasons, one of those reasons would likely be to make an individual enhanced for modern combat. This may not entail the usual thoughts of a supersoldier, with the goal to make complacent men super-strong and high-endurance people, but it may instead try to make a soldier a more intelligent and informed element on the battlefield, with neurological uplinks to a battlefield network for rapid communication and information relaying, and probably for communication to the unmanned systems we're putting into play today. A soldier might have a deja-vu-like feeling that "there are two guys on the other side of this wall positioned like so...", because the unmanned surveilance plane that flew by a few seconds ago just saw the guys through a window and relayed the information to all troops in the area.
But, my guess is if soldiers were given strength or endurance conditioning, the emphasis would be to make the soldier more survivable rather than granting a soldier the non-essential ability to crush a man's skull with his bare hands or something dumb like that. This would mean improving the soldier's senses, endurance, and maybe physical strength in the way of tougher bone structure and blood-coagulants that stop bleeding faster. Maybe a quickened nervous system or something. Who knows.
But really, adrenaline already handles alot of these problems. Soldiers have been known to not feel a bullet wound because the adrenaline inhibits their ability to feel the pain! It makes a person burn sugars faster, quickens the nervous system, speeds bloodflow and breathing, etc.
In the end, the soldiers are people, remember that. Most probably would welcome some voluntary improvements, but would also smack us on the back of the head for even contemplating others. Ultimately, soldiers return to being your average joes, and whatever improvements they have had done need to be compatible with society when they come back. It's a tough situation that we're pretty much guranteed to face sometime in the next few decades, at least in my opinion. I dunno, anyone else better schooled on this to set me straight?