We have a sign of life from the PC Gaming Alliance, where they announce the release of a pair of reports they commissioned on the state of the PC gaming marketplace they are tasked with supporting, which may reflect on the objectivity of their findings. The reports are for their industry members, but GamePolitics has a summary:

• The global PC gaming software market continues to show strong growth in 2012, reaching a record US$20 billion - overall growth of 8 percent over 2011 and 90 percent growth since the PCGA’s first report in 2008.
• China continues to be the largest and fastest growing market for PC games with record 2012 revenue of US$6.8 billion, a growth of percent. Mature game markets in Korea, Japan, U.S., U.K. and Germany all showed growth in 2012. Together these markets also increased revenue by percent in 2012, to $8.4 billion.
• There are over 1 billion PC gamers worldwide and that number is continuing to grow as more PCs are connected online. Over 250 million of those gamers play what are defined as "core games."
• The growth of mobile is helping the PC game business. The combination of mobile and PC as platforms is helping drive the growth of small self-funded teams that can develop more targeted products on a modest budget.
• The PC game business will continue to grow at a pace of 6 percent CAGR to $25.7 billion by 2016. This growth is driven by growing access to broadband connections and the increasing ease of digital distribution delivery solutions and payment methods on a global basis.