Depending how far down the rabbit hole they go in weird microwave resonating cavities and power amplifiers, maybe something of practical use for radar systems or other uses of multi-kilowatt microwave band power amplifiers will come out of it.
Imagine making popcorn in 5 seconds.
Imagine giving half your building a migraine in 5.1 seconds because you didn't catch it in time and have now burnt the popcorn.
What's the burned popcorn->migraine connection?
Presumably, it triggers the fire alarm.
The smell of burnt popcorn can induce migraine in some people (such as myself).
The outcome was known for 4 years already, but then he needed 4 years to confirm the first results with fool proof measurements. Nobody else should need to wait years for test results, but the pressure and expected flashback was enourmous.