So once again, it would seem to come back to the concept of intent.
The likes of the LUC tourbillon with a COSC (and I don't want to start a COSC debate on top of a tourbillon debate) at least shows that an intent to demonstrate time-keeping. Plus the internal pride of creating this capability within one's company.
While the whack-a-spinning-escapement-in-a-case crowd are chasing something else, completely, as well described above and below.