The X3DOM showcases reported here have largely been centered around industrial or scientific applications. However there’s a lot of potential for commercial applications that has not been explored yet. As the framework matures, it is much more interesting and usable for larger deployments.
One example of such an application is Mixee Me. A recent startup which sets out to bring 3D printing to the average joe. The gist: Mixee Mee allows everyone to create funny little 3D characters through a simple interface, have them printed with a 3D printer and shipped to your doorstep. In order to allow for online composition of the 3D figures, X3DOM ist used to drive the interface.