iPhone OS carves 19 share of mobile gaming revenue

Over the last year, Apple's share of the US video game software market has jumped 500%, eating into the growth of console games while also putting pressure on mobile gaming leaders Nintendo and Sony.

Source:
http://www.appleinsider.com/articles/10/03/22/iphone_ipod_touch_carve_19_gaming_share_from_sony_nintendo.html