They're playing with interesting ideas. The video doesn't make the whole argument for that type of headphone and you see on the graph that they didn't fix all the problems in their FR at least in this prototype. Standing waves still make it difficult to reproduce high frequencies accurately.

One idea that I like is that they're splitting the signal into two bands which will help reduce intermodlation. That means that even when the drivers play bass loudly, frequency response in the upper range is not being altered by it.

I'm personally not interested in getting high frequency transducers to the front. I prefer to have them as close to your ear as possible.

I also like that they are not too big, which helps with low frequency extension. I'm afraid they might be heavy.

We will see how it evolves. The first iteration likely will have issues, but two models down the line they might squeeze some performance out of it.