I bicycle everywhere and I sure would not wanna try taking my attention off the road. Might be different if I was taking long cruises down the blue highways like Behemoth was designed for. And probably quiet enough for dictation to have a decent chance to work.

Two-finger keyboard sounds like something that goes in the bin of "weird keyboards only nerds with tons of time to learn to use them can love" though, right next to all the other chording keyboards people have made over the years...