Copied this from the Wellsphere website,
On the horizon is virtual colonoscopy, a high-resolution CT scan with a software program that allows you to recreate or simulate the colon. This computer-aided diagnosis will shorten the time frame and allow more screenings to be done. Currently you can get a virtual test but the prep remains the same. Soon "prepless" CT scans will eliminate the need to cleanse the colon and most patients will embrace this. Another promising alternative that is being developed is the PillCam which is a capsule with cameras that are inserted or swallowed and project images as the pill passes through the bowel. We currently have endoscopy capsule technology that images the small bowel and the new pill would have double cameras that cover twice as much area as most of the small bowel capsules. We have a way to go with this technology but given its simplicity and the rate of innovation, this may be the wave of the future.
It will be a good day for all when the above is reality. Especially for folks like me who suffer greatly from the prep and have to have these procedures quite frequently.