I'm still not sold on this whole Beats acquisition. It seems like a mid-1990s Microsoft play.
Why not? They need a streaming service (iTunes Radio isn't good enough) and Beats is IMO the best one out there. Plus if the streaming service doesn't work out they're still covered as they've purchased an incredibly successful hardware company and brand. They'll make the acquisition cost back in sales pretty quickly.
NB: I use both Spotify, Beats, and iTunes. I purchase music I love in iTunes, use Beats for discovery or when I just want to listen to music and do nothing else. Spotify I use when I have something specific in mind or want something playing in the background.