For me the interest would be the correlation between what I see and maybe what the sensors told me.
Operationally, the problem is multiple colonies and variability between hives and often multiple reasons for behaviour - unless you had sensors on all of them. If you could make a link between measurable x and swarming for example, absence of that happening in one hive would not be definitive for others.
I suspect at this stage in their evolution, sensors would be interesting additions to inspections rather than substitutes for them?
Operationally, the problem is multiple colonies and variability between hives and often multiple reasons for behaviour - unless you had sensors on all of them. If you could make a link between measurable x and swarming for example, absence of that happening in one hive would not be definitive for others.
I suspect at this stage in their evolution, sensors would be interesting additions to inspections rather than substitutes for them?