A little ahead of it's time perhaps but such technology isn't hard to believe at all for the near future.
As for the new suit...badass...
Well, bones are hollow and porous for a reason, so there is room for marrow. The mass of the nanites has to be minimal to allow for continued biological functioning. If the resulting underwear is a micron thin and functions just as an extension of the nervous system it would be barely believable. I wouldn't consider it the "near" future, though.