http://www.wired.co.uk/news/archive/2011-03/31/kinect-drone This little MIT experiment was one of the earliest attempts to do the Project Tango.
Imagine a bluetooth 3D printer hooked up to a device that’s mapping as you move? Instant area modelling. Someone’s doing it I’m sure, or will. It’s just logical. Won’t be long before cheap home devices will let you scan your bedroom and print it out in 3D and color so you can have a model of it. Why? Just because. And it will simultaneously be available on your computer in a #Minecraft style program, or an app on your tablet or phone. Next logical step. I’m sure somebody’s on it