I'd love the ability to create an open brochure or magazine, or book mockup using the new overhauled 3d tools, but the tool is currently too limited. Seems to me that what is missing is the ability to bend or warp planes after they have been tilted and rotated. There are other ways of achieving this geometry, but they feel like hacks, and the new place graphic/material capability doesn't recognize the geometry that was partly made with other tools before getting into 3d. Please keep developing the 3D features in illustrator with product mockups in mind, including publication mockups.