Mainstream Media Is Tuning In to 'Podcasting'

It seems only a matter of time that the technology behind podcasting will replace cable TV. The way people intereact with podcasts is essentially the same as they interact with Tivo -- people like them because they can watch/listen to what they want when they want it. (With portable music players they can also listen wherever they want -- I suspect portable video players will become ubiquitous soon too.) Video podcasting would really be the holy grail of video on-demand technology, giving people access to a huge and ever-widening variety of content. Am I the first to think of this? Of course not! Anyway, speculations that podcasting may be a fad seem strange when the technology has so many great and commercially viable applications.