Potential for brilliance...
I watched this film one time (about a year ago). I wasn't overly thrilled with it. I found it boring and the quality was deplorable. I do, however, feel that the concept is brilliant. It is reminiscent of the Graduate, in terms of its social commentary on the American family and the NEED for something different. It is the execution that made the film suffer. Something as clean-cut as the image of the American family really needs a more glossy production. Some films benefit from the grit of 16mm - Evil Dead, Last House on the Left, but so is not the case here. It was the wrong aesthetic choice for a film of this nature.
I feel like the screenplay could be revelatory, much more so than the film. We could see all that was Romero's intention and visualize it the way we see fit. It deserves to be remade properly, but the context of the film is dead. It could not be about what it was about then. It would be drastically altered, far less socially relevant and less affective overall. The only way the story could function properly without altering is if it was a period film.