Earl Grieda wrote:

The video game music revolution is both a product of and a reason for the
larger gaming boom. According to the NPD Group, the leading market-research
firm tracking gaming, the industry took in $11.7 billion (all figures U.S.)


The $6.9 figure I cited was only for gaming software. If revenue
from hardware (game consoles and accessories like fancy joystics) and online
gaming is included, $11.7 billion may be a more fully representative figure
for the overall industry.