We're able to detect an incoming round and automatically kill it with a directed explosion, all faster than you can blink. What, are we going to see munitions that has submunitions of its own to counter the countermeasure next? (That might be a reasonable development actually)

Either way I'm fortunate that these things aren't used around me, and I'm not in any danger. I would love to one day see those C-beams glitter, as a spectator in safety

At the 2m20s mark, they claim this leaves personnel 10m away unharmed. So, it seems you can watch from quite nearby. You’d have to avoid being hit by the incoming stuff, though, and I guess wearing hearing protection is strongly advised, too.

As to countermeasures, I would guess this doesn’t work well against kinetic energy projectiles that don’t explode but depend on mass and velocity to do damage. Or would it?