Not sure I do... I can only imagine how dirty and scratched that face is going to get after minimal use with all the finger and face contact, not to mention general carrying around. You also can't touch dial at all... you can't do anything unless you're looking at the face since there will be no tactile feel to the "keys".

Tech wise and innovation wise it's VERY cool... kudos to them for once again thinking outside the box. However I suspect it might be more of a nifty idea than a practical one. I'd certainly like to be proven wrong though.