http://www.stanford.edu/group/ccr/blog/2009/04/post_17.html "Saving the Economy with Starcraft"

>According to Lee, there are almost 20,000 PC Bangs in Korea and they collectively make about 120 billion wons (about 100 million US dollars) every month. Lee has also stated that “This is not the only source of economic influence achieved by gaming. There are three cable channels for starcraft leagues and tournaments, as well as thirteen other professional teams. These game broadcasts have potentials to be exported into other countries, just like how Korean dramas were actively exported throughout Asia during 2002-2006.”

But you fail to account for all the starcraft 2 related projects that will crop up and the revitalization of starcraft related businesses ;)