This is even more newer than voice. This is eye movement detection. I think google needs to jump on this one and grab them. Not only because it will be an android answer to apple's Siri, but also because in the world of advertisements tracking where your eye ball is very precious to let go. And remember, if google does not act apple will surely. If both of them delay even Microsoft might do something. But something tells me that Samsung is probably looking very hard at this.
Eye-controlled interfaces have been around for years, but a new tool called Senseye might be the first mass-market implementation. Using a front-facing camera and infrared LED, Senseye tracks eye motion with enough accuracy to dim the screen when no one is looking at it, auto-scroll text on a page, and let the user enter a passcode or play a simple shooting game by looking at numbers or enemies. The proof of concept uses a bulky case, but final versions are planned as either small dongles or part of the phone itself.