I think it is all about the fad. Usenet was popular but eventually it became even more popular, therefore something new was created. It is odd to think that the internet is so new, yet at the time so undeveloped. The internet is outdated everyday if you care to look at it that way. New things are evolving to expand and process the internet in different ways.
Seriously...Pretty soon the user interface for the net will be a floating screen on the inside of your glasses. Also, the writers of the show "futurama" will control our minds, and earth will be renamed "the matrix."