It pretty clearly states that the first prototype used a film that selectively filters out just the frequencies of light used by RGB displays, but that they're doing the production run using the much, much cheaper horizontal polarization trick. It wasn't bad science writing, because that film really does exist. There are in fact a wide variety of these films for every conceivable use. The most common might well be the hydrogen-alpha film that every astronomer has used.
hey db48x! I'm with the team behind the glasses. It sounds like you might know a thing or too about optics. We're looking for engineers and researchers that can help us solve the hard problem of blocking OLEDs for our next product. A lot of people think it’s impossible but we’re willing to give it our best shot!