I have the Coral dual tpu module and have an adapter coming that will allow me to use two of them for a total of 4 modules, paired with an ARC A310 for video decoding.

The only bad thing about the Google Coral is that Google has stopped development and archived the driver so one you get to a certain linux kernel version you will have issues unless you switch from the official version. lemmy.world/post/46390410

If I didn’t already have the Coral I would probably go with the Hailo 8. I’m going to use the ARC A310 for detection on a couple streams and the Coral for the rest since the detection is more basic.