Convergence doesn't just mean telephones meeting computers on the Internet - it also means digital and Internet-based technologies impacting on every aspect of communication.
Everything is digital now, including our old friends television and radio. The old waveforms are being replaced by digital streams of ones and zeros that do all the old things - but faster, cheaper and better.
Convergence means technologies becoming more and more similar to each other. This means that something carried over one medium can potentially be carried by any of them.