We Could Be Living In Simulation Says Elon Musk

[notbatman]

^ the only simulation here is Musk and his SpaceX hoax.

[tetra]

The idea is much older.
Watch Fassbinder

[Gronthaing]

The idea is much older.
Watch Fassbinder

True. It is much older. As the wikipedia link op posted says the idea this reality could be an illusion goes back to ancient religious texts. But in science fiction the idea appears before fassbinder. Maybe starting in the 40s or 50s in a modern form. Philip k. dick has a lot on the subject for example.