Got the tablet two days ago and played it for a while... Project Tango utilizes IR depth sensor to obtain the distance of different objects (and possibly the resulting image is a combined work with fisheye camera). My assumption is they use camera to do some imaging processing to find out rough edges of different objects, and then use the depth sensor to get distance info. And to be honest, it is just a big toy when things work like they should. Continue reading Project Tango Tablet... Hmm...
Applied a while ago.. and got the email just now! Ordered the white version.. The specs all look good and price is reasonable: $512 + tax.
A short description of Project Tango:
Project Tango combines 3D motion tracking with depth sensing to give your mobile device the ability to know where it is and how it moves through space.
Well, basically everything is old but the depth sensors. Not very sure how do they handle the trajectory noise right now though.
Here is the screenshot: