What does it do? The exoskeleton turns futuristic soldiers into superhumans, with enhanced strength, agility, and other high-tech abilities. Wearing one can give the user temporary invisibility, boosted jumping, and the ability to punch through reinforced steel. It seems that the exoskeletons will also let players attach to walls with their hands and use various helmet-mounted visors to see through walls and protect their faces.
Is it realistic? Scientists have already started research and production on prototypes of exoskeleton suits meant for soldiers in the field. Of course, the real-life counterparts aren't quite capable of launching soldiers into the air or allowing them to climb walls like the friendly neighborhood Spider-Man--but troops have strapped into the suits to lift extremely heavy boxes. As far as the seeing through walls and cloaking go, I'll touch on those later.