Cartoonist Steven M. Johnson useshis former urban planner knowledge to envision it:
In 1975 I started predicting (in my drawings) that store-bought clothing would be sold pre-ripped; I was almost a decade ahead. In 1991 I showed a drawing of a small, radio-controlled vacuum cleaner that could creep under furniture. It was about the size of the Roomba, which was offered a decade later. Mere entertainment is sometimes a vehicle for suggesting what is in the air.
Above: Johnson's design for a Swimming Pool Moat to address crime prevention. You can see his vision for umbrellas of the future here.