I wonder what this product does to a garment material's breathablility? If NeverWet turns my tee shirt into a rain coat, does it simultaneously turn it into a sauna? If you build your next bathroom shower stall out of ordinary plywood and spray a coat of this stuff on all exposed surfaces, will it keep the water inside the stall ('till it goes down the drain) and out of the rest of the house?
If this product does what's claimed there would seem to be a long list of potential applications to consider, many of which rise to the level of "game changing". One example; constructing houses out of compressed earth is an economical and structurally robust design if you can keep water out of the building material. A coating of NeverWet would appear to achieve that requirement, making mud pies the building material of choice for at least single and two story structures.
Almost anywhere on Earth.
That strikes me as "game changing". NeverWet is supposed to become available through retail sources next year. If so, this is a product to investigate for yourself.