Comment Re:Be skeptical: this product violates basic optic (Score 2, Informative) 193
The concept is not that an image will hang in the air (like you said, impossible). However, if there is an exit pupil in the dash and you look at it, you will see what appears to be a large screen superimposed onto you view of the dashboard. If you make the focus of the image significantly different than the where the dash is, you will only see the image (think looking through a screen door, you only see the screen if you focus on it.).
I think the real probem with this thread is that it started on the cell phone prototype, which has some flaws (being a first gen prototype and all).
The real products that we make are all head mounted displays.