New takes on old tech, sustainability, and only moderate defiance of reason.
Really, this is just a collection of neat stuff with a certain category of flavor that I like to refer to as “kitepunk”. Kite-based wind energy is emblematic of this category of stuff in my mind: old tech in principle, with new materials and details, and all a little far out in terms of actual implementation. But really cool.
See also wiki.kitepunk.com.