What about having something faster than JavaScript, say, Python running in a similar plugin instead?
Something that has a complete modern 3D Engine and a Physics Engine with VRML and fair Blender support.
* Rotate in 3D with middle mouse button (MMB)
* Pan in 3D with shift+MMB
* Zoom with scroll wheel
* Print object's name on mouse over.
On top of this, built whatever later, for the above cover most visualization needs.