Ok so just a warpd/keynav style grid mode then? I thought OP was describing a novel concept based on the idea that initially the whole keyboard would represent the entire screen.

Yeah, "Grid Mode" sounds similar. But instead of only 4 zones it would just roughly map the keyboard to dozens of invisible zones based on the position of the keys on the keyboard. So it would mostly be by feel. I have no idea if this would be better or worse than "Grid Mode" but it would be interesting to try it.