Muse's "Drones" concept album is available today. According to Muse's website, you can buy it from them directly, or get it on iTunes, Amazon or Spotify. Noticeably missing is Google Play Music — hardly the first time we've seen no mention of the service when a new release drops. (And it's a little interesting that Amazon only links directly to physical versions, though it's readily available there in MP3 form, and for a few dollars less, too, which may have something to do with it.)
"Drones" certainly is available on Google Play Music, however. You can give it a listen here.
Next time something from your favorite band or artist hits, take a look and see if they (their label, really) mention that it's also on Google Play Music. There's still some work to be done there, apparently.