It should work and if one has a Track saw or router, it wouldn't be hard to recess the extrusion.
Factor in material width and that double down as a way to hide a fabric edge. Or one could cap the end and work in
a touch of hardwood, as a slightly different look.
I also think these extrusions could be rather interesting as step lighting. I am thinking that it might be a different look, when coupled
with something like Big's BigA$$ steps.
A friend used black speaker grill fabric bought by the bolt, from a fabric store for his room. He did a small lower velcro'ed panel that is
removable, and he uses the depth in behind as a wire conduit. Depending where the av rack is, and if coupled with something like Big's
two goal post AT front end, that all just strikes me as some potential future proofing.
Anyways, just a bunch of ideas tossed out there....