Why the motion trails? The Mario example doesn't have them and I can't recall any extreme motion trails from my days of playing console games on CRT TVs.
The screenshots are exaggerated; you didn't notice them because they lag by only about a frame. They did in fact exist, because it took time for the phosphors to lose their excitation.
...anyway, the apparent presence of the motion trails would depend heavily on a person's use of the brightness, contrast and saturation setting per each individual television set.
> One unfortunate downside to this implementation of trails is that it depends on having a consistent frame rate; it has been tuned for 60fps and will not behave exactly as expected at other rates or if vsync is disabled.
It's a very subtle effect, and probably absent in more recent CRTs.