Although the article focuses on the use of the Ultra-Ever Dry technology (specially engineered super-hydrophobic and oleophobic nano-paint, which repels water and oils) for Nissan vehicles (in the future), the same product can be used to reduce many of the water-dependent cleaning processes.
Could this be a way to improve water conservation in the long term?
Link to the article: eandt.theiet.org/.../self-cleaning-nissan.cfm