Web conferencing has been available for many years, however, it has yet to become a mass service.
There are already quite a few service providers offering web conferencing for decent pricing (monthly flat fees), using existing Internet infrastructure, however, telecom operator seem not too ambitious to offer competitive services.
This is insofar noticeable, since land-line operators suffer steep declining revenue due to competition from mobile operators and VoIP service providers.
Further web conferencing is targeting enterprise customers, which are the most lucrative customers for telecom operators.