You already don't get this with fashion photography. "The model is 6'1 and wearing a size M" is meaningless when you don't know their weight, dimensions, or whether they've clipped the back to make the garment appear trimmer for the photos. Trying an item on in person is the only way to know whether it's good, and that's the potential AI disruption I'm most interested in.
I would be VERY happy if I could use my own sizes on a proper 3d model and see if it fits