1) The keyboard (layout) was not invented for the computer, but for the typewriter;
2) Their whole premise seems to be based on 'gestures that mimic handwriting', well why don't they just have gestures that are like handwritten characters?
Gestures that are like handwritten characters are harder to deal with on the software side and slower to use on the human side. Handwriting recognition has been around for a long time. I don't know how this will compare speed-wise, but it's definitely simpler.
1) The keyboard (layout) was not invented for the computer, but for the typewriter;
2) Their whole premise seems to be based on 'gestures that mimic handwriting', well why don't they just have gestures that are like handwritten characters?