One of my colleagues at Montage Studio was involved in developing the glTF spec. We built a set of open source components that make it easy to load a glTF scene and manipulate the contents with data bindings and CSS transforms: http://montagestudio.com/blog/2014/01/22/build-3d-applicatio...

Those who are interested might also want to check out this recent paper by Brian Coughlin that compares glTF and Declarative 3D: http://mason.gmu.edu/~bcoughl2/cs752/