I have Movies, TV Shows, and Music all added to my Plex library.
When I first launch Plex, it cycles through random cover art or band pictures from my library. I really like this feature, but a lot of the time (mostly with music) I have no idea what the source is, especially since I don't know what a lot of bands look like.
It would be nice to have this shown in small text in one of the corners on top of the image, just to provide information. "Oh, that's what the members of XYZ look like!", instead of "Who the hell is that?"/"Who the hell are they?"