Once the TeX/LaTeX site proposed at area51 goes up, would stackoverflow still be home to questions on that topic?
As had been argued in other questions, writing in TeX/LaTeX is programming in a certain sense. Therefore they belong here. On the other hand, a massive shift of LaTeX questions from here to there would give a massive boost to that site.
On a similar note, I don't think stackoverflow would skip a beat if another q&a site just for Java starts up. Would it be any different in the case of TeX/LaTeX?