It's been mentioned a few times but I believe haptic feedback is absolutely necessary to the future of the touch screen.

How many times have you handed your phone to someone to show them and in the process both you and the person receiving accidentally made a multitude of gestures, resulting in your phone freaking out and opening all kinds of random apps/windows..

I love how the new iPhones have the "press" ability on apps to open more options. Personally I wish all interactions required a little bit more force (besides, say, scrolling). When almost half the device is responsive, it makes it all too easy to accidentally perform actions.

Does anyone know where the technology is with this? I remember seeing articles a long time ago about potential for brail via haptics in screens