As broadband connectivity spreads around the world, so do the value-added services of voice over Internet protocol (VoIP) and Internet protocol television (IPTV), according to a new report from eMarketer.

According to the Telecommunications Industry Association (TIA), VoIP subscribers will account for over one-third of all U.S. landline subscriptions in 2010, up from approximately 10 percent in 2006. eMarketer estimates that 46 percent of U.S. broadband households in 2011 will subscribe to a VoIP service, equating to 41.3 million VoIP subscribers.

The future of IPTV is a bit cloudier. Three key elements, bandwidth, a favorable regulatory environment, and favorable TV market dynamics are blocking the technology's widespread use. France is the only country with over one million IPTV subscribers to date.

However, eMarketer still forecasts that there will be 41.1 million IPTV households worldwide in 2011, up from approximately five million in 2006.