Originally posted by fuent104 Global shutter, the opposite of rolling shutter, is desireable
for video, yes (global electronic shutter, as opposed to rolling electronic shutter).
However, most possible analog implementations of a global electronic shutter (charge buffers) have a negative impact on image quality, be it read noise or full well capacity. Digital implementations could avoid that but don't exist and would be very expensive, esp. with high pixel counts.
The jello effect is reduced by faster readout speeds and I expect that with increasing sensor speeds (I hear of 1080p@120Hz sensors and 4k video coming soon) the jello effect will become small enough to lift the pressure to make a global shutter. It is kind of a race and it remains to be seen if a global electronic shutter will ever come to a still camera.
Note that the K-3's mechanical shutter is a rolling shutter too (corresponds to 4000p@180Hz) and nobody ever complained about its rolling shutter effect in stills...