In that video the tops of the buildings appear to roll backwards on the S3 because they stretch so bad.
this distortion of image (outter edge)...its not effect of rolling shutter on cmos, its property of wide angle lens. (obviously u already know g3 has more wide angle lens than Iphone)
Also the S3 has a really wide angle of view that is almost too wide. They should have included a digital zoom for video,
wth ..there's no digital zoom on S3????
too wide? compare to what? iphone4s has 4.28mm focal length, thats 33mm on 35mm equivalent, thats also wide angle lens than standard. (38~55mm, some would say its 50mm)
The fruit phone has coated optics like a pro cam and a slightly larger lens which adds to sharpness.
umm.. if you meant pro cam as a professional camera, then no. all smartphones uses plastic lenses. if there are smartphones with glass lenses that aint iphone.. cuz it takes 10x more time to produce glass lens than plastic on modling.
if u meant by iphone4s lens with f2.4 and GSG3 with f2.6.. that has nothing to do with size of lens, since smartphones lacks physical aperature, thats just brightness of lens. (usually brighter lens are more expensive).
using brighter lens gives some pros, like faster shutter speed, taking better pic at low light situation.
anyway there are rolling shutter artifacts (effects) on smartphone, cameras, even DSLR with CMOS. and the video you showed has nothing to do with it. its jerkiness on anti shake mode on galaxy S3.
jerkiness on anti shake mode
Samsung Galaxy S III Sample Video - Anti-shake on - YouTube (anti shake on)
Samsung Galaxy S III Sample Video - No Anti-shake - YouTube (anti shake off)
reproducing rolling shutter effect is simple, move camera left and right fast.. vertically straight line doesnt stay straight and it gets tilted. like this one.
Canon 7D - rolling shutter test 480 720 1080 24p 30p 60p - YouTube