Lennart Borgman writes:

 > Then I think Emacs must move in the direction of much tighter
 > integration with compilers and environments.  Tighter integration
 > with the environments probably means allowing Emacs to be used as a
 > plugin (in the browser in this case).

I don't really see that.  In the great majority of cases there's about
one file to worry about (a CSS file accessed from a <link rel=stylesheet>).