At some stage isn't that likely to happen? All the tech companies will start eyeing the music and movies studios, wondering what it would mean if Apple owned them all, and they'll start snapping them up.
One can also look at the not-that-long-ago "merger" of AOL with Time Warner as another example of a media/tech marriage where the supposed synergy was vastly exaggerated.
I'm not sure I see any reason for another major tech company to leap in to buying huge legacy businesses given the lessons learned by their competitors.