The introduction of the Xbox 360 was a defining moment for...

The introduction of the Xbox 360 was a defining moment for the industry in 2005. However, it goes without saying that the full impact of next generation consoles on the consumer market won't unfold until later this year when Sony and Nintendo's video game consoles hit U.S. retail shelves. The real story for 2005 was the incredible expansion of portable gaming. The GBA continued to realize stellar sales, and the introduction of the DS and PSP to the market brought older gamers to the portable format.