Reznor is there for window dressing. What the hell does he know about how to stream music? He's suddenly a programmer?
He's likely not a programmer (he could be for all I know - it's not that hard to learn), but if he isn't - THAT is the whole point.
STEVE JOBS wasn't a programmer either.
Apple gets it that you don't just let the nerds create products, or you'd end up with.....Microsoft. You also need big thinkers who understand the real world - in this case they've acquired Beats who employs musicians and music industry experts.
When they first bought them, I too was like, WTF? Headphones? But they also got all of the streaming deals Beats already negotiated, without the record labels holding them by the b@11s just because they're Apple.
When record labels and Metallica were all freaking out about Napster, MP3s and piracy, Apple + iTunes saved them.
Now they are all freaking out about Spotify and falling digital sales...and Apple is poised once again, to save them.
As is their secret formula, they waited the appropriate amount of time to come to streaming. And they'll bring the best Hardware, Software, and Big Thinkers to deliver the best solution....not first, but best.
.02