'In the past seven years, a handful of engineers have taken the military's 40-year-old fantasy of mechanically enhanced soldiers that can carry heavy loads and begun to make it real. Funded with millions from the Pentagon's Defense Advanced Research Projects Agency (Darpa), Jacobsen and others have finally begun marrying artificial muscles and control systems into suits that could soon be available to soldiers, firemen and the wheelchair-bound. There are still serious challenges—powering these wearable robots, for one—but Sarcos's XOS, the most capable full-body suit, one that moves seamlessly with its wearer, has even the comic's creators feeling like the real world is catching up to their vision. After Adi Granov, one of the main illustrators of the comic and a consultant to the film, watched a clip of the suit in action, he was startled. "I knew that's where we were heading, but I didn't realize we were this close," Granov says. Aside from the lack of flight and weapons, he adds, "that's Iron Man."