Great trailer.
What I got from it is Abrams addressing his love for movies and Spielberg, but mostly movies. The whole idea with them making movies and capturing it on camera tells me it's saying something about the very magic of movies themselves. Like childhood wonder and innocence that an audience should feel like when they watch a film. The kids could represent that innocence and nature that grown ups and even teenagers have forgotten. All applied to the magic of making movies. Kind of like Nolan does with the Prestige but that appeals to the child in all of us, which is never a bad thing.
This could be something very special.