If VoIP is the killer app for broadband , then we're living in the dark ages.
Voice over the Internet is not new. It has been around for a while.
The real killer application for boradband is marketing, or I should say, the proper marketing of the services and applications that can run on broadband.
Compare it to the car. All cars provide transportation. Some provide more comfort. But, it was the ability to get somewhere faster and easier that killed the horse and made the car successful. Why? Henry Ford and others conveyed the message. That's marketing, which is what VoIP really needs.