Lockheed Martin HULC
Photo from Lockheed Martin's website.
Lockheed Martin has recently publicized their new HULC (Human Universal Load Carrer), an exoskeleton capable of carrying 200 lb. As you can see from the video below, it is being marketed with military applications in mind.
I would be more impressed, but the HAL-5, developed in Japan several years ago and already available to rent, assists both the legs and arms of the operator. Not to mention it looks a lot cooler.