I use the "Unwatched" filter all the time, this cleans up my (rather large) library.
But every now and then i would like to watch a movie that has already been watched, but then all the Unwatched movies appear as wel.
I really would like to see a "Watched" filter as well, especially now that we can create smart playlists, so that i can create a "Watched" playlist for example, that would be even more convenient than enable/disable filters.
Any chance this will be implemented?