In that case, Airbus made an even better boat than I thought. *laughs*

The idea of non-skid surfaces on the wing surface, at least to me as a non-pilot, sounds like a bad idea. Three reasons. One, I'd think you'd want as little as possible that will interfere with lift, and if it was textured enough to poke through the paint it might, but it would more likely promote icing at altitude. Two, if it is just stuck on, it will eventually unstick and become FOD; if it is part of the skin, it is adding weight. Three, it will make natural places for ice accumulated on the ground to stick to and harder to clean the aircraft in general thus increasing corrosion issues.