You basically answered your own question. You'd need "futuristic sci-fi shit" to pull that off. What you're proposing would require nanotechnology on a level that's straight out of a cyberpunk science fiction story.

Yep, every. time.

I'm open to the idea that maybe someone can make a better dehumifidier at some point in the future, but any article that talks about "water from air" which doesn't acknowledge that dehumifidiers exist is automatically suspect in my books.

So I suspect that this is the usual project that hopes to rip off some people on Kickstarter or Indiegogo or wherever.