in this current prototype stage it's just that...a technology prototype. I can't think of a single application where picking up that monstrousity would be more convenient that doing it some other way.
Now if they can make the sensor hardware smaller and easier to use, then sure. I have a nokia 770 web tablet

that is fun to use, but if I could hold it in my hands and use my fingers from behind to scroll and click links, that would be neato. Having a 12" boom off the back with a camera? not so much
