2&3. I did write "(outside of Air and games, let's say)". Did you miss that?
See also Emscripten, which produces GC-free well-typed JS. We're also working in Mozilla Research to show Emscripten + JS can competes on performance, and excel on reach, with alternative single-browser and proprietary approaches.
2/3. Yep, I missed that. Fair ;)
Yes, I have been following Emscripten and it is promising. No doubt clearly on the excel on reach just some remaining doubts on the performance and CPU/battery usage.
If you guys truly want to have this valuable, also make sure the entire system is consistent, like Flash, and not just in Firefox.
As I said, it is a neat research project, I will keep watching Shumway grow :)