Peephole displays and personal information spaces

This video, by Ka-Ping Yee, is great in so many ways. I love the ingenuity of his prototyping, and even though none of his input methods are viable, I'm sure this is the way we will interact will mobile phones in the future. Most phones nowadays are prepared for video telephony and have a tiny camera pointing at the user. I can imagine a face tracking algorith to be used for navigating a space like this. Maybe you could use a combination of gyros and accellerometers to accomplish the same thing.

/Staffan Lincoln - 4/7/2008