What will happen if it becomes a standard for input and you have users grow up with it who never learned QWERTY? It's premise--that you're typing with a QWERTY layout in mind--then becomes broken.
Someone can then invent QwertyType: an actual keyboard on the screen. This will be faster for these users because they won't have to guess where the software thinks they think the keys are.
Someone can then invent QwertyType: an actual keyboard on the screen. This will be faster for these users because they won't have to guess where the software thinks they think the keys are.