This whole thing makes me sad.
Apple should be announcing radical world-changing technology no one else can afford to produce.
Instead, we have this.
wtf
Apple's central philosophy is that they make the best products. Other companies make their computers out of plastic because that's the cheapest suitable material. Apple make their computers out of aluminium and glass because those are the best materials to make it from.
Apple have never set out to make an expensive product; it just ends up that way because they don't optimise for low-cost like other manufacturers do. But the goal was never to make something more expensive just because.
They've never cared about the markets, either. Other companies (Dell, HP, etc) were making profits for a short time while on their race-to-the-bottom, but Apple always stood firm and believed the profits would come if they just kept making the best products. Now the PC industry has been almost totally bled of all profits - Dell collapsed and had to go private, and the biggest PC OEM (HP) is trying to get out of the business altogether. Apple, and Steve Jobs specifically, ignored the markets calls to join that race-to-the-bottom and now they're finally being proved right. They couldn't care less about figures like market cap. or stock prices; that's never been a motivation for Apple.
Apple does seem to have lost its focus somewhat.
The question they would be asking is "
how do we give iPods/iPhones/Macs the best music experience on any platform?"
Back in the day, that involved creating a tightly integrated music store where people could legally purchase music straight from their computers and load it directly to their devices. That experience was much better than you got on any iPod competitors.
The world has changed. Cloud services proliferate. Streaming is now the preferred method of listening to music, which presents difficulties for Apple because they are typically platform-agnostic. Apple needs to look at that question again from a modern perspective and come up with new ways to give their devices the premier experience for music.
There are lots of ways to do that. Apple could partner with (if not acquire) Spotify to give iOS/OSX devices exclusive access to higher-quality music streams or more permissive free tiers, all integrated in to the system. That's one example of how Apple can give their devices an edge. I just can't think of any way that buying Beats exclusively improves Apple's platforms - the headphones are cross-platform and the streaming service is mediocre and can't compete with Spotify (especially the social aspect).