They actually started the transition to IPv6 in 2008. They just ran out, but in a couple of years, IPv6 will be used all over the world. I think Australia and Asia are already using it.
It's just time to test out some real IPv6 applications on 08 server. Don't know much about Linux, IOS and other OSs though. It had be implemented for years but nobody really got around to put them to real application. The transition is already undergoing, we'll see how it goes in 10, 15 years I estimate?