Spatial Anchors from markers in the real world?

Spatial Anchors are great, but alignment to real world things is annoying. We would love to be able to use markers from the real world, like back in the old days of VR where there would be codes on the wall/ceiling/floor.

AprilTags or Aruco Markers, preferrably the former. We would envision having 2 or 3 in a space and that would completely solve the spatial anchor setup scenario.

We'd also be open to more exotic things like support for looking for a cluster of IR LEDs embedded in a table.

Is support for real world markers in the roadmap?