I am far away from the opinion that VRML/X3D is in any kind of trouble (How many times have we heard that before?). In trouble perhaps, is misinterpreted, broken, or misguided visions of what VRML/X3D is, but in itself VRML/X3D is very well thank you....
Open Standards for Real-Time 3D Communication
A nonprofit organization that develops and maintains the X3D standard--a 3D file format and runtime specification that is open, royalty free and ISO ratified for transmission of 3D data over networks.