Back in 2009 and 2010 I described how I felt touch screens needed to adopt something like the technology used for braile displays (called haptic displays) to provide tactile feedback as to the mode of the current display.
A company called Tactus Technology has now made that possible. I didn’t really have phones in mind, though, I was thinking more of cases where you could expect not to be looking at the input area – tablets, secondary displays, etc.
But then again, couple a smart phone/tablet with Microsoft’s Second Screen for Xbox and, actually, tactile phone feedback would be handy: allowing your phone to serve as a context-morphing controller. Woot.