This article examines ‘Skinput’,an input system which promises to truly revolutionize the way we interact with computers by eliminating the need for screens. It aims at replacing them with our very own skin by being able to accurately differentiate between the mechanical waves generated when different parts of the arm are pressed, or a complex action involving several bones in the arm is performed.
1) I can definitely see the system finding its way into many mobile devices in the near future. Most of the demonstrations mentioned in the paper target it for such an audience. For example, it could be used to change the current track on your mp3 player without having to endure the hassle of pulling it out from your pocket or having to access it on your arm band. Another use could be to display the name of the caller or details of a text message on to the windshield of your car while you are driving.
2) The paper also mentioned that the system is accurate in differentiating between surfaces. This feature could find its way into several industries for example, in archeology. You could just by touching an object be able to glean a lot of information about its composition. It could also find its way into the kitchen, you could tell what a particular ingredient is just by touching it. However, the researchers admit that the system is still in its infancy and it might be quite a while before sufficiently powerful hardware is developed, for it to be feasible commercially.
3) Most importantly the system is not a million dollar science project which will probably never see the light of day. The paper suggests that it is built from materials which are relatively inexpensive, which means that it will not be long before someone snaps it up and implements it on a commercially available platform.

1) The system requires you to wear an arm band at all times. This might become a little uncomfortable for lengthy periods of time.
2) The accuracy of the system was considerably reduced with test subjects who had a higher BMI.
3) The feedback system(arm mounted projector) was not as visually appealing as a regular touchscreen. Also, it might vary depending on the skin tone of the person.