eMarketer

According to Piper Jaffray, worldwide Kindle revenues will reach $405 million by the end of 2009, and more than double to nearly $1 billion in 2010. To gauge the impact that Kindle is having on the book business and the general e-commerce space, consider what Mark Mahaney of Citigroup told TechCrunch: The device, first introduced in late 2007, accounted for approximately 10% of total North American book units sold in Q1 2009—or about 4 million out of the 38 million books sold.

Ad spending began contracting in early 2008, well before the financial crisis unfolded in the fall. Among traditional media, television is predicted to fare better than newspapers, magazines and radio.