The Japanese NTT DoCoMo at CEATEC showed truly innovative user interaction interfaces for mobile devices - this is the i beam tablet, which is controlled by the look, and the Grip UI concept, which works with compression.
The technology of tracking of a look uses close to infrared illumination and the special camera which watches where the owner looks. Navigation is carried out by moving the gaze, and to "push", respectively, you just need to hold your gaze.
The iron part of the Grip UI is the pressure-sensitive sidewall of the phone, which can distinguish up to 5 degrees of pressure. A smartphone can be programmed to perform certain actions and, thus, one-handed control can become quite a convenient process — for example, the same “Back” button in Android can be hung up for compression. ')
There is a video from Engadget, in which both prototypes look quite workable: