Sarah Janssen. Stephen Lovekin/ Mark Von Holden hide caption

itoggle caption Stephen Lovekin/ Mark Von Holden

Jason Munkel and his father stream their Call of Duty games online every night. In the past year, they've gained more than 120,000 followers. Twitch/Activision hide caption

itoggle caption Twitch/Activision

A screenshot of the online multiplayer Pokemon game. Twitch.tv hide caption

itoggle caption Twitch.tv

Warriors battle at the 2012 JORVIK Viking Festival. This year promises to be even fiercer, with the apocalypse looming. Allan Harris/Flickr.com hide caption

itoggle caption Allan Harris/Flickr.com