In one of the busy malls in Tokyo, Ikuko, Japan's oldest and most famous geisha dances for shoppers in an elegant black kimono with precise movements. Only, the 86-year-old isn't really there; it's her hologram, a 3D projection of her, displayed in a life-size white box. "Thank you very much," she said to passers-by, before bowing and changing to a younger version of herself, created with AI.
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