Warner Music announced that streaming revenue passed downloads for the first time last quarter and they were the first large music label to hit that milestone. In short, I disagree with anyone that thinks this market is mature.
The iOS integration doesn’t stop there. They have implemented incredible search features into Siri. I have used iTunes Match for a couple of years and pay for it just for Siri integration. In fact, merging my music library with Apple Music is a huge bonus. With this new service, I can tell Siri to play just about anything and it will start playing. Now the fact that the service doesn’t have "Back in Black" available isn’t going to require me to go to a separate app to play it.
Video and Beats1
At first blush, I can’t see that I would ever use Beats 1 Radio other than trying it out, but I wanted to mention it since a lot of people like DJs. I remember when I first picked XM radio over Sirius, which were two separate companies at the time, the main argument for and against XM was the lack of DJs. Personally, I usually prefer music without them, but sometimes I think they can bring some interesting facts to a song/artist/album and I do enjoy that in specific genres. However, I doubt anyone like Jonathan Schwartz will be on Beats 1, but I will at least try it out.