The document discusses a potential future invention of teleportation. It describes how a teleportation device might work, with users entering a large closet-like structure, selecting their destination on a touchscreen map, and then being transported instantly to the target location. The summary argues that teleportation could save money on transportation costs while reducing pollution, but that it may also be dangerous since the technology has not yet been developed and safety is unknown. Significant investments would also initially be required.