Market Trends: Software as a Service, Worldwide, 2008-2013, Update
According to this Gartner report, network administrators better get ready for a while lot more traffic. Worldwide software as a service (SaaS) revenue is forecast to reach $7.5 billion in 2009, a 17.7 percent increase from 2008 revenue of $6.4 billion.
Gartner predicts that the market will show consistent growth through 2013 when worldwide SaaS revenue will total over $14 billion for the enterprise application markets. In other words a lot more demand will be placed upon the network to carry applications over the web and into the enterprise. Note that this is paid research.