None of which are likely to happen, I'd point out, because vim, emacs, bash and zsh are all tied into some sort of notion of a virtual terminal with software controlled cursors, etc etc etc. Plan 9's TTY is astoundingly primitive by those standards; essentially it emulates a line printer but doesn't even have the good grace to allow backspacing. Oddly, said terminal exposes the contents of the scrollback buffer—both read and write—to a file, which is how the native Plan 9 history mechanisms work. This is entirely deliberate, of course, and a substantial part of what makes the system so different and interesting, but step #1 to porting those would involve reinventing xterm, basically.

In theory for vim and emacs you could work around that by using the graphical interface, much as say Acme does. I would estimate this to be at least as much work as porting from X11 to, say, Cocoa was, and possibly even worse. And this port would only get you a vim or an emacs that was materially identical to its Unix counterpart—no Acme style control FS and essentially no cooperation with the normal Plan 9 UI elements.