I thought it was weird that i didn't found any links to babylonjs here :)
Seems like a great framework!
We have great things coming on babylon.js in the next days. It's mainly a personal project we have as a small team with David Catuhe, Michel Rousseau and Pierre Lagarde. We have great feedbacks so far!
Maybe needs a warning label for slightly older systems.
Once it's loaded, it should be faster to reload as we've implemented support for offline via IndexedDB.