a week in the wrong hands and it will pop up porn on that thing, you wait and see. Seriously though i think that has potential for partially sighted people, maybe it could even be altered to raise brail for the blind to read as well as typing on.
Theres a lot of people (the older variety ) that cannot cope with touchscreen pda's or phones, and I reckon something similar to that but with bigger fat finger buttons would be great.........