Romanos wrote: Still though, I can see genuine benefit to this route, especially for churches.
I agree it's an interesting approach, and ought to produce realistic tone quite efficiently for the fundamental and a few higher harmonics. Two reservations I have:
The longest resonators in the publicity information look like 8', probably they would not reproduce 16' tone well (or at all), and almost certainly not contribute lower.
To work optimally, I would presume the resonators need to be tuned according to the pitch and temperament they will be used with. This might cause difficulties for HW users who like to keep and use the original pitch and temperament of sampled organs.
I might well be wrong on both counts of course.
Nick