Only four K5s are going into service by the end of the year; while that's better than other robots, many of which are strictly experimental, it's not ushering in a sea change. If automatons like this catch on, though, they could change how building security works. Independent robots will let human guards respond only when it's both necessary and safe, such as to confront an unarmed intruder or help out the injured. That's not going to be much comfort to employees that might not be needed for much longer, but the bots could be worthwhile if they keep people out of harm's way.