Guardbot

What looks to be an impressive spherical robot, suitable for all terrain applications, including water.
 To me looks to be best for applications like security, tacking and surveillance in open areas.  Not fenced or environments requiring interaction with human barriers like doors.  Lots of video examples of uses at the link.

Applications.  GuardBot Inc. is a cutting edge engineering company focusing on the design and development of amphibious, spherical robotic vehicle systems. ....

Guardbot was initially conceived for a planetary mission on Mars, and can operate in many demanding situations, as it can travel on paved road, off-road, sand, snow, sloped surfaces, and in water, where it can navigate upstream. Guardbot is designed for mission operations in broadcasting, surveillance, security, and detection.

Applications

As one of the world's only truly amphibious robots, GuardBot is capable of supporting a wide range of applications in security, broadcasting for live video action streaming, and missions.

 GuardBot accelerates and decelerates quickly and smoothly on land, while amphibious movement is consistent. GuardBot can be integrated with a great variety of sensors, cameras, communication and navigation subsystems and processing equipment allowing GuardBot to operate in many missions.

 For broadcasting applications the Guardbot robotic vehicle system can image land, snow, water, and can be used to operate in multi venue sportscasting including golf, swimming and soccer games. In broadcasting, GuardBot is a flexible and reliable content acquisition tool that can capture imagery and sound from land and water and back again.

 In addition to gathering content, GuardBot makes for an eye-catching advertising platform. GuardBot can be outfitted to carry sensors and other payloads as well.

In security applications, GuardBot can be remotely operated and controlled, or programmed to navigate or patrol a set route of waypoints along perimeters, buildings and fields. The two cameras can be positioned independently in order to monitor conditions or check for intruders.

 The Guardbot robotic vehicle system’s advanced radio communication systems include high definition imagery transmission, encryption capability, mesh networking, and satellite communication.   ... "