Greasy-finger enabled heatmaps for iPad
Taking all these greasy little fingerprints as a source of information is a great idea, and the photos George Kokkindis took have their own beauty (I wonder is the iDraft image a self-portrait ;-)?).
Interestingly, the results mirror heatmaps that are often generated to analyise websites with expensive eyetracking tools. You can even sense how much pressure is applied to individual areas on the screen.
thanks @supersoon
