How exciting it would be to use EAP's (electroactive polymers) that can bend stretch and change shape in response to electrical signaling. You basically put on a skin tight thick suit (like a dry suit) that is controlled by your own bodies electrical signaling via an implant? Sort of like a fascia outside of the body that gives you a massive boost of strength and super human ability. Fantasy, I know.....

A pair of skis that have a core that can stiffen under stress, bend or chatter would be interesting too. Wearing exo legs while skiing may work for some, but I think would take away from the fun and challenge. I suppose it'd let a person ski faster, which in turn would warrant the variable core. Wouldn't want to fall though or would the exo legs act as a protective mechanism? The material in the core could also be in the exo legs, like a variable turbo-charger.