A tank or just a giant shotgun?

One word comes to mind when I watch this, devastating. I love at the end you finally get to see what it can do, by hitting all those targets.

Although, as amazing as this is, it does make me think of how our military can use it. Like, we spent all this money on the F-22 and we are fighting cowards that hide in closets and place hidden explosives in random places I hope we can find a way to use this more.