Basically, what I've just described is "just" a variant of "intelligent directories". Why should directories just be passive containers? Why not allow extra work to take place behind the scenes when certain magic directories get updated?
I hate configuration files and I hate programs that I manually have to run to catch updates.
I want intelligent directories that automatically email/rsync/backup when I copy/move files to them. I want intelligent directories I can drop fonts or video codecs into.
And I want intelligent directories I can drop applications in.