This paper looks at the future potential of uninhabited air vehicles, UAVs. The paper begins with a rationale as to why UAVs are needed. A taxonomy of future potential UAVs is presented. Three generic types of UAVs are identified as surveillance and reconnaissance, combat and support aircraft. A total of sixteen possible UAVs are identified. Each one is discussed in terms of mission capabilities. The paper concludes with several “out of the box” concepts, and concludes with a summnary of the potential role of UAVs.