"Resonance was actually discovered when Christiaan Huygens ...
...observed how the two pendulum clocks he had on the wall of his room synchronized after oscillating for a while. Just like the wall allowed for that coupling, the mainplate allows for the coupling of the balances in the Chronometre A Resonance. "
Sure. I suspect the wall wasn't moving.
As soon as I see an test showing that the resonance effect and happen when the coupling surface is moving in an irregular manner (like a wrist), I'll believe in it for a wristwatch like this (without a physical coupling like a Duality). Until then, it's marketing mumbo-jumbo.