Different ideas:

    Remote management (files stored elsewhere)
        (work on a file list)
    Local management
        Can inspect media files for meta info - resolution, playtime etc

Media Manager Application Ideas:

    Batch processing of folders and files
    IMDB integration - movie title (year) selector
    DB
    Thumbnails
    Movie Info
    Trailers
    XBMC integration
    Extra features
    ffmpeg and HandbrakeCLI integration
    Subtitles - rename, extract, ocr to srt, download
    utorrent integration
    TV series - episode guides and naming
    find duplicates