When you look at your iTunes library, you can instantly see how many items are in each library: Music, Movies, Podcasts, etc.
I wish iTunes could do the same thing for playlists. Instead of showing playlists just by name, they could append tags to the right of them, like this:
It could be useful sometimes to be able to see, at a glance, how many items a playlist contains, for both smart and regular playlists.
It’s not a big deal, but for some iTunes users, it could help manage a large library.