One thing I don't like about iPhone is their proud patented "slide to unlock" feature. When I have to use iPhone one-hand, it is frustrating to unlock because I must slide my finger exactly where the slider supposed to be. Having proper "feeling" feedback will make touch-screen more natural and convenient.
I'm not a big fan of motion recognition, especially for smartphone / smartpad. Even for in-room application (TVs, Air conditions, etc) I don't feel like dancing in front of a machine to command something.
Really cool tech on display. I thing such technologies can help sensory handicapped people a lot. Most people whose one sense is handicapped will have other senses more receptive. I always think that technology can help human overcome their natural deficiencies.
The 3D haptic rendering work sounds exciting -- being able to mimic real textures in a convincing way opens up a new world of applications for haptics. The old-school haptics of a buzzing sensation from a piezo device or a DC motor seemed mostly like gimmicks to me. In fact, they were usually more annoying than useful.