This I believe would apply to all 4 desk top App's
To take into account for todays digital age where we are all downloading from various digital sites for; video, books, music and games a new standard field be introduced and the relevant search & download plug-ins be updated to accommodate this:
File Size: (in Mb for books & music and Gb for video & games)
Text-to-Speech: enabled or disabled (Bookpedia only)
If forum members can suggest other standard fields to take into account todays digital age please post.