PC Gaming Alliance Releases Newest Horizons Hardware Research has data from the occasionally dormant PC advocates on PC gaming hardware sales outstripping all console hardware sales combined, using a discreet GPU as the criterion for a gaming rig (thanks Computer and Video Games) Here's an excerpt:

Among the key findings: Annual shipment volumes for the PC Gaming hardware market in 2009 were over two times larger than the combined Wii™, PlayStation® 2, PlayStation® 3 and Xbox 360® console units shipped in the same period. This trend for the PC Gaming hardware market to outpace all console shipments combined is expected to continue through the forecasted period of the research. In addition, revenues from consumer PCs capable of gaming that shipped with a discrete GPU (excludes Netbooks and integrated graphics-based PCs) totaled approximately $54.6 billion in 2009 and are forecasted to grow to $61.3 billion by 2014. These revenue figures are based on an estimated 61.5 million PCs (Desktop and Laptops) shipped in 2009 that can largely be associated with PC gaming as a key usage scenario.

The report also estimates the worldwide number of consumers gaming with discrete graphics solutions on their PCs (Desktop and Notebooks) to be 212.6 million for 2009 and expects this to grow to about 322 million by 2014. The report also includes detailed breakouts of various PC configurations (e.g. Basic, Mass Market, etc), by form factor and by geographic territory.