If something like this could be field deployed, it seems like it would be great for bivouac perimeter security, and we would have heard more about it.
Been in development for a few years . First I saw of the (not this one specificly) same sort of system was Bosnia.......
Stay Safe
I would think that for the mid term this type of system would be best for the protection of long term fixed positions where all the local acoustic geometry and anomolies can be debugged thoroughly. That is to say, protecting an Israeli neighborhood or settlement from the enemy, or high value fixed targets such as 1600 PA Ave etc.
I don't think this will be the type of system which would just be rolled up to a new site and prove effective right away, but I could be wrong.