They ought to add a white paint product line and make it the whitest paint ever. Paint the roofs of California with it so it reflects sunlight and reduces energy costs.
They were one step further than just reflecting heat, they were tuning emissivity to actually give off heat and cool the surface underneath. Extremely impressive from a heat transfer perspective to cool a surface passively!
The idea is basically "sky is really cold, give it your heat." Fascinating.