hi, great point. It is true that at the moment our userbase is mostly physicists/astrophysicists and computer scientists who heavily use LaTeX. But we are not super committed to LaTeX. (In fact, I am annoyed by LaTeX as much as the next guy.) We already fully support Markdown and soon AsciiDoc and MediaWiki. An HTML5 wysiwyg is coming soon as well.
You are wrong, however, when you say that for academic publications almost no one uses MS Word. In fact, only 5% of academic submissions (in all academic journals) are received in LaTeX. 95% is Word.