Vanishing Point Navigation

This  laptop rides a Roomba around and looks for straight lines. By triangulating their convergence, the little droid is able to navigate endless hallways, blasting zombies with its on-board shotgun…well, maybe in the next model.

This may not be a likely standalone navigation system, but combined with those systems used by things like the robotic rats, and maybe some GPS, we could have these things zipping around our hallways doing errands and causing accidents in the very near future.