OK – I admit I don’t really understand this. I think the idea is that this technology is for an internet of things (IoT) water monitoring network that is self-sustaining in that it gets its energy from the motion of the water it is sensing. Whatever it is you’ve got to love anything that is called a “Water Contact based Triboelectric Nanogenerator”. I am pretty sure they had those things on the USS Enterprise. What it really means is that predicting the future of hydrometry is almost useless. The evolution of water monitoring technology can be highly non-linear.