That's a pretty interesting idea. I don't think we've had anyone suggest anything similar, but we have had plenty of requests to be able to copy or save editor contents with HTML or RTF formatting. If and when that feature makes it in, something could probably be hacked out in a Slick-C macro.
There are of course some technical hurdles with that kind of "whole editor" approach. SE isn't really designed to run as a server app, so I imagine it would have to be running with a window station available. I don't know if there's enough in the pure C/C++ DLL code to get all the required info without loading the whole editor (for the macro interpreter). A lot of the syntax support, esp for dynamic languages, is in the Slick-C code.