a friend of mine that just graduated from the academy and it's transfering to the Army has many war stories about rpgs hitting abrams tanks and bullets ricocheing inside the tanks,from many higher ups he has had contact with and were in combat in Iraq . That's one of the main reasons he was turned off by the tank service,instead he went for airborne school .
However I bewlieve in 20 years you will start seeing mobile suits like those of anime fame, but me think the technology will be imported from places like Japan since they're so advanced in robotics, and there have been several coimpetitions with primitve suits to help the user lift weighs of up to 500lbs.
So I mean science fiction I believe in less than two decades will be more science than fiction.