What's the two keyboards layout for? At first I suspected that they are two different keyboards, let's say US and some national layout, but they are both US. Maybe the black one is not connected and it's there only for the picture?

Anyway, that's the keyboard/touchpad layout I would use too. The only difference is that I like touchpads with physical buttons. Three of them because I use Linux and pasting text with the middle button is great.

Ah yeah, the extra keyboard was just there for the photo. I designed the PCB so I'm kinda proud of it :)

I agree that physical buttons are nice. The older magic trackpads actually are physical buttons, but they're on the underside of the trackpad, so the disadvantage there is you don't feel the button on the surface.