In media, form follows function. We need to know what's going on right now, so we listen to radio. We want to see what's going on, so we watch television. We'd like a little more complete story, so we read the newspaper. For stories we want to read about in even greater detail, there are magazines.
Radio delivers information, music, and talk.
Newspapers give us information, editorials, cartoons, and something to wrap fish in. Magazines bring us in-depth information about our jobs and hobbies. Television brings information and entertainment. The information takes different forms, but it's present in any successful medium. The information content on the Web is still minimal.