"My opinion from what I have seen so far, you should not put many hope about a magic button to export to HTML5.
Many attemped to do that and all them failed miserly."
Disagree, nobody wanted it. Look the world; it has how many billions of dollars of crap floating in the ocean, people LOVE plastic, so it's all over the earth. Cross compiling, they didn't want it, it WAS possible.
EDIT: And let me add that the corps in charge don't recycle, because all cross compiling is, is recycling already used carbon and energy. HAHA Screw this world and their hypocrisy.