When my friend Greg sent me this link I’m sure he wasn’t thinking of the fashion applications of this new technology. The scarf uses a color sensor and a matrix of red, green, and blue LEDs to adopt the local color as it were. This reminds me of the active camouflage used by some ships and planes in WWII. The vehicle was illuminated by lights that were dimmed to match the ambient light levels. This would make the object harder to see at a distance. I suppose that the same would be true of a person wearing this if it was emulating the color of the wall behind the wearer. I doubt that it would be used in only this way, the fashion impaired would make a better market for this sort of thing.