I was thinking after Canon announced this high-sensitivity 35 mm full-frame CMOS,
it would be great to have (not new to opinion) maybe a square sensor!
Well, for the video i think it would not be the best choice while it would get a lot of
sensor area out of use, and at the same time the 16:9 format will be a little small.
But i think while it would be The SENSOR for APS-H lovers, it would have some advantages:
Less vignetting, less distortion, less every artifacts, it will use the sweet spot of the lenses, resulting with sharper corner to corner image, maybe more noise but that should get better with the new technology.
That was all about quality, but that's not all. What about the versatility? = Best square Images, not having to turn the camera for portrait format.
But once again, i'ts maybe just a dream, and probably it will never happen mainly because of the video, and of course having another format it's just too much, too small compared to FF...