> Once they can put high quality positional tracking in an iPhone, the whole problem is basically solved Not a big fan of Apple, but AFAIK they have a decent c

> Once they can put high quality positional tracking in an iPhone, the whole problem is basically solved Not a big fan of Apple, but AFAIK they have a decent camera on the back of that thing capable of high-FPS video capture (google tells me on iPhone 7 it’s 240 fps for 720p video). You fix e.g. 3 balls in your room near you, from that image it should be possible to track position by looking at the video stream. In robotics, balls like this are sometimes used for similar application: http://www.precisionballs.com/Satin_Finished_Balls.php http://www.precisionballs.com/Satin_Finished_Balls.php You can even go without special objects in the view, if the background is contrast enough, ain’t too far and ain’t too close. Not sure about latency, though.