Life Paint is the trade name of a highly-reflective spray paint developed by Volvo to increase the visibility of cyclists during trips after dark. The paint on the bikes lasts for about one week after use, but is easily washed off without damaging the surface to which it was applied. Although initially developed for the use of cyclists, it could also protect pedestrians.
A new patent reveals Amazon's plans to deploy "air fulfillment centers" (AFCs) that would each act as a flying warehouse from which drones could deliver goods to customers. These AFCs would hover over areas where demand is expected to increase for certain products at a certain time for example at a sporting event. https://futurism.com/a-flying-warehouse-new-amazon-patent-reveals-the-potential-future-of-retail/?