Hi sushi,
I guess I'll have to get out my old laserdisc player--I've been using it as a doorstop! And I'll need a high-def projector, of course.
Seriously, I've never seen any tests or comparisons of degradation with very long S-video or component-video cable runs. I recall doing some tests of composite video and there was a slight fall-off of image quality with a 30-ft. cable.
I've been told that there is visible degradation of S-video with runs longer than 20 feet, and I've never seen any data on long component-video runs.
Report your findings. . .
Regards,
