>>340856996
>the Index controllers with their finger accurate sensors
They're nowhere near accurate enough to map 1 to 1 to keyboard typing directly. 

Thinking about it though you could in theory make a swipe-typing-like predictive system from "typing" by tapping your fingers on the index controllers, not directly typing, but miming it and having the software predict what you meant. Smearing your thumbs around on the bottom of a touch screen has about the same amount signal I'd think. It would be an interesting project at least.