Some other related discussion is here:
As I know only AI core (for QuMagie) and QVR Face/Human can utilize this module.
Personally I will consider the CPU of 664 is not powerful enough to fully feed the Hailo module for AI detection features. But from my rough experience it can run 4-5 face recognization tasks on QVR Face. While Coral can only adds about 2-3.
While on high-level, for example i7 NAS, it may run 30 tasks for face recognization by co-working with a powerful CPU.
Imo on Celeron platform a Coral TPU might be sufficient.