Video isn't the only medium that's exploding into new devices and delivery mechanisms. Audio entertainment is too. Bridge Ratings predicts that there will be 187 million Internet radio listeners by 2010, more than triple the number there are today.
Coming on even stronger: audio delivered wirelessly over the Internet, which is expected to grow to 159 million listeners from just 6 million this year. Bridge also predicts that mobile phone audio streaming will achieve a larger user base than Sirius satellite radio within the next five years.