I'm not sure the timeline is correct, but Bill Simmons is comparing the rise of Podcasts to the fall of newspapers. Satellite radio and podcasts already seem the same to me, except you have to pay for satellite radio (hardware and subscription) and podcasts are free.

Bill Simmons: ...I love doing the podcasts and feel like I'm on the ground floor of a medium that is really starting to take off. It's like radio on demand and I think it's going to kill satellite radio in 2 years. I really do. It's also a huge threat to real radio in my opinion, especially when people can get internet in their cars and can just cue podcasts up within 3 clicks. It's astonishing to me that nobody has written a long piece about podcasts yet. This is EXACTLY the same as what happened with sportswriting in the late-90s where nobody was taking the internet seriously and suddenly within 7 years there were a million sports blogs, mainstream sites were crushing newspapers and newspapers were hemorrhaging money. We are headed that way with podcasts. I just think radio is going to become much more niche-oriented over these next 10 years... people don't see it yet. Christian Slater in "Pump Up The Volume" is going to look like a genius.

I try to listen to This American Life, but I usually need a long car ride for it. But I listen to every episode of SModcast and The BS Report. Smodcast, with Kevin Smith and Scott Mosier, is hilarious and might be the only media I find myself laughing out loud to when I'm alone. The unifying theory of Smodcast and the BS Report are famous people hanging out with their friends talking about movies and sports.