Its a giant ipod, run!!!
Is that really any faster typing than a keyboard. The keyboard has always been the slowest input device on a pc. Right now i am thinking faster than i can type, and i can type pretty fast.
But, as of now for me, nothing beats the old qwerty keyboard. That may change someday.
Although, this would be a great way to type on smaller devices. Since that spin wheel is common on apples mobile devices, implementing a keyboard on those devices, which are too small for a regular kb, would be great.
But, on a laptop there is room for a keyboard. So, unless its faster, then it would be worth it.