...I am more interested in asking why does this interest Chris all of a sudden ?
And furthermore, why the fuck is he mentioning his OCs to Elon of all people?
...oh nevermind. Chris being Chris again.
Because Chris thinks that all characters and OCs ever imagined are real in their other dimension, so Elon Musk's "theory" that we are all characters fits in perfectly with Chris's "if you think it, it is true" mentality. Of course, TBBT is the height of science news as we all know, and it's definitely a real theory that Musk has and not some goofy comment he tossed out at an interview once.
You know, Chris must never have been a fan of Lauren Faust's other show "Foster's Home For Imaginary Friends," because they had a couple of episodes that relate heavily to this dumb theory of his. Basically there is this girl character who has a very active imagination, and constantly imagines new Imaginary Friends. So the whole place gets overrun with all of these things she imagines, because she can imagine five or ten at a time. She is actually banned from entering the Foster Home since she'll just overflow the house with all her imaginary friends. There's also an episode where it's shown that babies' imaginations create basically little static balls, which are all stuffed into a big room at the house since they are being created perpetually by new babies and they are about as sentient as a sea cucumber.
If
everyone's OCs and characters were all real in the other dimension, it would be ridiculously populated. I'm sure almost everyone on Earth with a non-re/tard IQ has imagined some form of character at multiple points in their lives. And Chris has created at least one character "by accident", so it doesn't have to be a purposeful manifestation. Population density in this other dimension would be insane, there would be standing room only.
Of course, he can't grasp the concept of Australia, and these days likely barely comprehends the world outside Virginya and maybe Maryland, so something like that would never tickle his rotting brain.