Survey says: Digital grows, TV edges up, radio stays flat.

A new set of predictions from Magna Global indicate that ad revenue will grow to $536 billion in 2015 worldwide, an increase of nearly 5%. The survey projects that digital media will hit a 30% market share globally in 2015, and will surpass TV revenue in the United States by 2017. Radio’s tepid performance in this forecast—essentially flat—looks good when compared with newspapers (down 4.3%) and magazines (down 7.3%).