This is going to be pretty much all spoilers, but here we go.
The premise of Tomorrowland is that some of the world's brightest minds have found another dimension, and intend to use it as an intellectual utopia, to further their work for better humanity.
They plan to introduce potential residents to the idea by showing them an illusion of the ideal Tomorrowland, a trailer for their utopia.
But the badges which carry these trailers are distributed by artificial humans, they aren't really people. When we actually see the present day Tomorrowland, there's definitely robots (obvious, metal ones) and only one person living there.
So my question is this, how many human beings actually went to Tomorrowland? We know about the four scientists who initially founded it, and George Clooney (Frank Walker) and Hugh Laurie (Nix). The rest of the residents might have been artificial, or an illusion.
Is there a source on this?
I'm talking about prior to the ending of the film.