I've now seen the film and I recommend watching it. There's a lot of information so I'm not really in a position to review it yet. The idea seems to be that we've reached a tipping point. Our way of live needs to change, and it can do this in an orderly or disorderly fashion. The film is an outline of what is going wrong, a plea for a orderly transition, and to some extent a blue print for how we might create a more sustainable and equitable world.
The Four Horsemen DVD is for-sale on Amazon.
I'm also reading the accompanying book: Four Horsemen: The Survival Manual. Review to follow.