Evolution of Video Game Business Models

From CNET.com, the enterprise software market has been going through a product-to-service transformation for a number of years. One clear representation of this is the boom in open source and software as a service, both of which are built on a different value curve in relation to typical enterprise licensing. Writer Dave Rosenberg goes on, the game market is at the beginning of an evolutionary path--moving from purely packaged games played on consoles to browser-based free-to-play and hybrid-hosted scenarios.

With free-to-play and open source the norm for video game software, where are these business models headed? We'd like to hear your thoughts.