Clicking the artwork allows you to bring it into a separate window, drag your mouse over it and it will allow you to control the album; pause, play, forward, back, etc...
Looks great on a desktop, when you're listening to a whole album through. It gives you simple controls on top of the album artwork.
That is what I was trying to show in the photo.
It should be specified that we're talking about the artwork in the lower left corner. I had that hidden (useless really) so I was just clicking the album art in the hybrid list view.