Tbh I think if they went for the patent style display with these stick things and no buttons they might label the right side one 'A' and the left side one 'B'!
Oh, now see, that's true too! So, kind of like:
Hard to say. The patent had multiple options..but then it was also talking about the wheels being motorised and allowing force feedback/haptics (which would be trickier if it was just a touch pad).
The bonus of motorised scroll wheels (which could give some resistance/recenter)...is they could be the best way to replicate analogue triggers on a handheld.
You can do that with springs too if you don't let them rotate 360 and instead just a small arc. I have an old camera with that kind of a switch on it for zooming in and out. Just a 1D analog stick basically.
I was kind of thinking like that too, that having some resistance would be nice. It'd feel better to operate and you would be less likely to overshoot whatever you'd be scrolling to select.