This is an interesting innovation from US-based Magenn Power; a high altitude wind turbine that is designed to harness the powerful winds such as the low-level jet streams that exist at around 1000ft above ground level, by embedding a turbine in a balloon.

The ability to deflate and redeploy quickly would also make it pretty attractive for temporary power sourcing.

This would be an interesting alternative to normal wind turbines, provided that the implementation can be practical and economical.