That was the prediction yesterday by Steve King, CEO of communications strategy company ZenithOptimedia.

"We predict global Internet advertising to pass three milestones in the next three years," a rep for Zenith said in a statement. "To overtake radio advertising in 2008; to attain a double-digit share of global advertising in 2009; and to overtake magazine advertising in 2010, with 11.5 percent of total ad spend."

Link to article on AdWeek.

Link to global ad spend chart.