@ Belle citation, un peu réductrice tout de même
"But there's a problem with weblogs. They're myopic. They're all about the Web and what's on the Web, but they really aren't about anything else that's happening in the big wide world. The reason for this is simple. The people who publish weblogs are, by and large, deskbound. They sit there all day and surf the Web, looking for interesting things to write about on their weblogs. The rest of the world doesn't show up on their radar (...)."
de l'article Moblogging for the Masses par Mark Frauenfelder pour The Feature.