Its very simple: All we need are thinner tubes (at least half the diameter than now) and less belly in the sail.
First advantage: the the kite would have less drag.
Second advantage: the kite can eat the gusts better - you don´t have to power on...power off...power on...power off all the time.
Similar to a modern windsurfsail you would have to move it at the start, but once you have reached a certain speed it would generate constant pull. Even in gusts. No depower needed anymore. Power-on all the time. Means more speed.
Third advantage: You can use better boards if you have better kites. Current speedboards are built in the way they are because they must equalize the unconstant pull of the kite ! With constant pull you can use stiffer boards with more grip and longer and stiffer fins, because the gusts dont pull you over anymore. Means more speed.
(Reminds me of the development in windsurfing 30 years ago.)
Fourth advantage: If no depower is needed, it means less "work" at the bar for the average rider, too. So kiting becomes way easier - you just have to lean back and let the board go !
So its interesting for the whole kite industry.
Technically we just need more air pressure in the tubes to reduce diameter. So the tubes must be enforced - we need a completely new tube technology !
I hope in a few years we will only laugh (or vomit) at the big blown-up sausages we use now