Interesting concept done for Microsoft some years before the Ipad/tablet wave. Notice the notepad app concept which is very close to the excellent Paper app from fiftythree.
An MIT Touch Lab study of Human Fingertips to investigate the Mechanics of Tactile Sense found that the average width of the index finger is 1.6 to 2 cm (16 – 20 mm) for most adults. This converts to 45 – 57 pixels, which is wider than what most mobile guidelines suggest.
1. Designing for 34 / 44 pixels touch target (Windows Phone UI Design and Interaction Guide and iPhone Human Interface Guidelines)
2. Designing for 57 pixels touch target (ergonomically correct)
3. Designing for 72 pixels touch target (Thumb correct)
Yes, Facebook could (and should) improve their interface. Fred Nerby from Brisbane, Australia, has done a great job in this conceptual showcase.
I still like this one (from 2009)
Dear Santa, please bring me a tablet for Christmas…