His comments on anchoring virtual tools in physical space reminds me of the work Microsoft was doing with Hololens and Windows Mixed Reality. If I recall correctly, there were APIs for anchoring things in space.
I recall stumbling upon those too in the Win 10 mixed reality API docs. There were a lot of interesting things in there that never really saw the light of day/any significant use
EDIT: Found the API docs. There's some really interesting classes in there! I remember handling coordinates to be confusing/a pain though haha. https://learn.microsoft.com/en-us/uwp/api/windows.perception...