Google Play Music scored an update today, but don't get too excited, as it's a relatively minor one. Most of what's new are slight design tweaks that bring it up to speed with Material Design and away from its previous look.
Along with some general design tweaks, the artist, genre, and album pages have gotten a bit of a redesign, and you'll also find a change in the look of the slide-in drawer on the left of the app as well as small changes to the way artist info and album artwork are displayed. The orange background at the top of the page has also been extended downward slightly to replace the gray tabbed look of the previous version.
The update is rolling out now, but in usual Google Play fashion, we're seeing it on some devices sooner than others.