I fear that three.js will be more or less obsolete with the rise of emscripten/asm.js which allows basically any 3D Engine there is to Run inside the browser.
There is still some work todo in regards to quicker deployment but i wouldnt invest heavily in pure JS based engines right now as there will be tremendous leaps in this space (eg Unreal Engine3) in the coming months.
That being said, this is an awesome Tool!