Hi, yes it would be a great feature to have (although without a real 3D context, the actual usefulness have to be assessed).
As you wrote this should be an extension of the trajectory tool, so right now there are things more critical to it. (improving the automatic tracking, tracking multiple points.)
When tracking multiple points will be in place having a wire frame buddy as the tracked point collection should be straightforward.
It's already on the suggestion list, but there are a significant ammount of things to fix/improve first.




