Gartner in a new estimate saw digital music accelerating rapidly but also a possible sea change towards subscription services. It expects the total business to hit $6.3 billion for this year, up nearly seven percent from $5.9 billion in 2010, but for that pace to accelerate as CDs die out and subscriptions grow. It saw an eight percent increase coming in 2012 to $6.8 billion and a 13 percent jump in the longer-term future of 2015.
