How is this so different from planar loudspeakers which have been around for decades? E.g. https://en.wikipedia.org/wiki/Magnepan https://en.wikipedia.org/wiki/

How is this so different from planar loudspeakers which have been around for decades? E.g. https://en.wikipedia.org/wiki/Magnepan https://en.wikipedia.org/wiki/Magnepan