Show depth, not just the front angle
Static photos usually hide the real depth of a sofa, chair, table, or shelf. A 3D viewer lets the shopper rotate the piece and understand the full form, drag to spin it, zoom into a seam or a leg detail, and inspect the material up close in a way a fixed hero shot never allows. For considered purchases like furniture, that difference matters more than it does for smaller, cheaper items, because the cost of guessing wrong is a bulky item that has to be packed up and shipped back.