Link to the Cisco document that serves as the basis for this claim:

Cisco Visual Networking Index: Global Mobile Data Traffic Forecast Update, 2009-2014

http://www.cisco.com/en/US/solutions/collateral/ns341/ns525/...

edit:

One of the more interesting predictions:

"Picoprojectors are a nascent feature addition to smartphones. Although very small in number, this category promises to create higher multiples of traffic due to the high bandwidth required to project images and videos from an advanced mobile device."

I'm not so sure, though. Will picoprojectors really change consumption habits that dramatically?