Excellent question, but I would challenge your 1060 card idles between 4-5 watts (that may be what it reports, but even under clocked\volted will be 10+), secondly that is idle most 1060 will be running 55w plus, but agree they won't hit their peaks.
On-Paper the Coral has extreme performance at 1.5watts.
In the real-world, paired with Frigate or ProjectAI agree the performance is far from extreme.
It's also far too new for Production Use, but here is the thing, it holds extreme potential to improve the efficiency of NVR solutions and is closer targeted at Image Recognition than a GPU.
My primary NVR has a 3060ti (just happened to be the most affordable GPU I could find at the time), and I was getting 30ms response times.
With Coral (default clock), and CodeProhect-Ai I get around 110ms response times. So much slower, but actually more than sufficient for an NVR use case.
If I was doing a new build, would I consider a Coral over a GPU? Honestly unsure, but the module that fits in the WiFi slot for $29 with 1.5w power draw is very tempting for a low power consumption build.
Another use case may be poor\low ventilation, removing the GPU from my rig, drastically reduced the heat output.