Well, the helicopter flew anyway, so you haven't actually saved anything.

You do bring up a good point. Quadrotors can fit in a trunk, and select units would be on scene with them when they're needed and that's something a helicopter can't always do. Another tool in the toolbox, not able to replace the helo, but able to fill a niche anyway. I still think they should install FLIR on their helicopter though

Now larger, long endurance UAVs are another thing. They may indeed replace helicopters one day in major metropolitan areas. It's weird though, some people just don't like the IDEA of a UAV loitering around, but for some reason they don't have as strong a reaction to police helicopters used in the same role.