Google's Project Tango

For some context these were unveiled in 2014 - http://www.zdnet.com/article/google-introduces-project-tango...

There was a presentation at Google I/0 2015 - https://www.youtube.com/watch?v=iP9m9a2KEN4

Lenovo announced at CES 2016 that the technology could appear in smartphones this summer. - http://www.lenovo.com/projecttango/