Short but true. A mood. It made me think of this documentary series called 'Life Without People', which looks at what would happen if suddenly all humans on Earth no longer existed. How some things would deteriorate, how long it would take for nature to take over, etc. The Mona Lisa would eventually be eaten by termites, for example.
I'm glad you didn't give a specific date that this will happen. Makes it much more real, since we don't know when it'll happen, only that it inevitably will.