Daniel Ek is an unlikely prophet for the music business.
The founder and CEO of Spotify is a computer geek who spouts terms like "real-time data trends" and "cost for distribution."
But the young Swede was (forgive me) spot on in his predictions at the Fortune Brainstorm Tech conference. He sees two mega-trends that he believes will power his online music service from 10 million to 50 million users: social media and connected devices.
When you join Spotify through Facebook, you are immediately connected to your friends and can see their entire music library (yes, you control who sees that library).
As you learn about new bands, share your favorites and build playlists, your loyalty to the service will grow -- certainly more than your loyalty to Walmart, anyway.
"Back in the day, the most interesting part of...