Many years from now, when we are old and gray, we shall tell our grandchildren of the primitive times of our youth. We will tell them that once it was necessary for a medical technician to insert cameras into our bottoms in order to take pictures inside.
They will marvel at these tales because in the future, robots will be able to inch their way through our colons like worms. This video from the System Integration Laboratory at Okayama University in Japan shows how this impressive locomotion system works.
Presumably the next stage of colonoscopic development would give these robots artificial intelligence so that they make independent decisions and act autonomously.