Besides the obvious possibilities for a Drupal boom in 2010 (launch of Drupal 7), there are several other reasons that may spark an increase in popularity.

Government Interest

The fact that whitehouse.gov launched on Drupal was huge news in 2009, but with the recently published "Open Government Directive," the whitehouse site may be just the tip of the iceberg for Drupal.

Our species thrives on speed and efficiency. As James Gleick's book, "Faster: The Acceleration of Just About Everything," implies, we are "instant" addicts of the manic 20th century. The need for instantaneous transfer of information is in our veins and it translates to our creation of technology and the web.