So here are a couple of questions: Taking Nix at his word that the people of Tomorrowland genuinely want to save the Earth, why don't they go back and bring some of that magical technology with them? I understand why he would fight to keep the normies out of his paradise, but why not bring paradise to the normies? Those flying, city-building robots might be pretty useful in staving off the end of the world. Meanwhile, if Nix and the Tomorrowland gang don't want to save the Earth, why do they keep broadcasting the (apparently sincere) warning?
But with respect to Tomorrowland, we're left with two problems: 1. In recruiting the world's inventors and geniuses to join him, Nix, like Galt, is implicitly starving the world of the very people who would be best-equipped to save it. But that is not his goal. 2. Knowing that the world is doomed (and giving up any hope of saving it), rather than attempt to find as many "dreamers" as possible to populate Tomorrowland, Nix sets Tomorrowland on a course of total isolation. It doesn't take Nate Silver to see that this is demographic suicide. Ah, you might say. There's the moral! That we're all like moths to flames, genius and non-genius alike. But that also directly undermines the whole premise of the story: that we can change things by dreaming. It suggests instead that oblivion is coming regardless of who you are or how much you studied in school.
One might wonder, then, whether it's not genius versus non-genius, but dreamer versus cynic. That's arguable (it's certainly suggested) but if dreamers are the key ingredient to change the future, why the hell was Tomorrowland built in the first place? If dreamers really could change the real world for the better, they never would have felt it necessary to withdraw. The wonder that is the city of Tomorrowland, in fact, is proof that dreamers cannot change the future. Here in the real world, the best dreamers can do is build new cell phones on which to smear around our facial grease. But in Tomorrowland, freedom, isolation, and a couple of decades result in geniuses and dreamers building hovering swimming pools, laser blasers, and transdimensional teleportation devices. From the start, Tomorrowland was an extremely cynical venture, but he results don't lie: it was also an axiomatically correct one.
Finally, it might be suggested that perhaps Tomorrowland intends to somehow refute Atlas Shrugged. That were John Galt really to build his remote Objectivist paradise, he would eventually turn into Nix. I would argue otherwise simply because Galt had a plan and the clarity of purpose to see it through to the end. If Nix's actual motive was to destroy humanity, to what end was he working? Eventual conquest? This is never suggested in the film. Rather, it's pretty clear that he wants out completely, and is as worried and uncertain about what comes next as anyone else. So again I ask: why wasn't he hustling to recruit Elon Musk and Jeff Bezos and any number of real world geniuses before the mushroom clouds starting sprouting? In short, maybe the film is meant to be an affirmation of Atlas Shrugged. What does failure look like? Nix's half-hearted effort. To see how to make it work, see John Galt.
Very broadly, and perhaps if told over a much longer timescale, Tomorrowlandcould also be a retelling of Foundation by Isaac Asimov. The "time window" is Hari Seldon's psychohistorical analyses; the Earth is Trantor; and Tomorrowland is Terminus. But this also implies a plan for the aftermath of Earth's apocalypse, which Hugh Laurie seems not to have.