That almost sounds like Reagan era star wars stuff.
And the detractors said it would never work. Not to mention the technology from those programs, that are in use today.
"Shooting down a single artillery shell is pretty cool, but artillery shells don't come in ones,"
As they get smaller, deploying several of these and linking them via wireless to a central supercomputer would be quite potent. They could target and hit multiple incoming rounds without duplicate targeting.
In addition, this technology could be adapted for other uses. Target enemy units from far greater distances than conventional weaponry allows. Heck, use it as a "sniper" device. Pick them off one unit at a time until they all hide in a bunker, then Fuel-Air Bomb the bunkers.