This is an amazing project, a tactile (think interactive simplified Braille) interface, attached to an iPad with Lidar. The idea is that you walk with this device and the camera tells you about obstacles in your path via this interface.

While this is a relatively simple interface, it does show a path towards something much more complex. I can imagine adding audio (via AirPods, say) to the interface to give you even more clues about the path and obstacles ahead.