If anyone wants to create something bespoke to them, then good on 'em. The more choice the better
Market forces will dictate if it's worthwhile.
From a personal perspective, I think it looks like a quality product, neatly put together and able to provide something different.
Would I want it?
No, it doesn't suit what I use my bike for, but for someone whose choice is to have those adaptations because it will make their riding more pleasurable, then sure they should go for it and I hope they get lots of enjoyment from it.
I'd also go up and look at it with interest, if I saw it parked up.