Podcast, the radio's future?

Podcasting is a revolution in the radio's history. As it happens for TV, radio no longer needs a specific technic to be listened at. For instance, on yahoo, we can listen to radio programs whatever is the time, the subject or the language. Honestly, I have never podcasted something, but I am quite sure of the future success of this new way of listenning to radio programs, and I believe that this radio on demand could become a real revolution in the freedom of expression's history, because it will more simpler to produce a radio program: people will be able to produce one by one program, without the necessity of talking from a radio's studio. Every body will be able to talk through the radio!