See http://m.bbc.co.uk/news/business-31300982. A general discussion of developments in wind power, the flying wind turbine section is some way down the article. But this time they're ten years away from being ready.
But Jan Matthieson at the UK's Carbon Trust argues there are "a lot of questions and a lot of risks with airborne power".
"A lot more work and testing needs to be done for these companies to build up a track record, and with very high [development] costs it will be difficult for new technologies to break into the market."
He believes it will be at least 10 years before flying turbines reach widespread commercialisation.
At the bottom of the article it claims that 31% of China's energy comes from wind power, I'd like to see independent verification of that!