I think the point here is that like all things, the days of the manned SAR helicopter are limited. However they are not over yet, and there will be another generation of them for sure, but it may be the last.
The RAF are procuring the Tempest as their next Gen Fighter. It can be either manned or unmanned, and the Chief if the Air Staff has said it will be the UK’s last fighter with a seat for a pilot. Now, I know that Air Combat and SAR are not the same sport, but the principle is clear.
Drone and UAV technology is progressing and developing at an exponential rate. I feel the most likely outcome will be other solutions being used alongside helicopters in the medium term, but in my opinion their utility will continue to increase, until they become the reference solution.
This particular device is not the solution though. This is the stone that Barnes Wallis skipped across a lake - but the bouncing bomb is coming.