Not exactly. If you browse down that thread and read the dissertation and the accompanying slides, you see that that demo goes well beyond positioning a rectangle (texture) in 3D space (which we already do at famo.us).
That guy went on to explore cuboids in addition to rectangles as a basic windowing primitive.
Not sure what your getting at. The Wayland demo looks like it could be completely recreated with existing CSS3 3D transformations.
Here's a similar example in a browser using HTML and CSS3. These transforms can be used on anything you can fit in a DOM element: https://www.webkit.org/blog-files/3d-transforms/morphing-cub...