I'm using Firefox (latest) and at one point tried to enable WebGL. I'm not one to keep trying to fix something just to make a web page work, though.
Does WebGL even work in software rendering mode, or do you need to have hardware rendering enabled? I have no idea if it is or if my drivers support it (Windows) but I would hope we're not forcing everyone on the web to have direct rendering now.
What's the licensing situation with such models? I seem to remember Lucasfilm (http://www.lucasfilm.com/divisions/licensing/) being pretty active ($3 billion in licensing revenue in 2011), but presumably they're not interested if there's no money involved?
Today, without download option, we are just considered like YouTube: a service hosting files uploaded by users, on which we have no control. When we launch download & commercialization of models, we will indeed have to find a licensing deal for copyright content.