They also said the following: > It would be possible to reuse one of the generic embedding elements, such as <embed> or <object>, for this purpose. However, we

They also said the following: > It would be possible to reuse one of the generic embedding elements, such as <embed> or <object>, for this purpose. However, we think that 3D content should behave like other media types. I think their argument is that although it is semantically possible to use object, they think this would be clearer for the future.