Resulting in imperceptible jello for most practical purposes?

What you mean?

Increase of readout speed for sensor results in much less rolling shutter artifacts.

I wonder if this gets around some of the cooling issues of global shutters. Although I don't understand the specifics I thought current global shutter implementations generate a lot of heat?

Global shutter requires additional elements in each pixel. And such elements add some noise (including heat noise) they also can lead to reduction of sensitivity (as they take space).

With stacked sensor all of electronics also adds heat, but it is located much further from sensor.

Such stacked design is very good for smartphone design as all logic and buffer are very compact and on sensor.

Tiny aperture + very fast shutter = need excellent lighting... Realistically mostly outdoor daytime use. My RX100m4 @ 960fps has very noisy images indoors, as expected. Lots of fun though.

Well, if you mean pure math aperture, it is not tiny, as it'll be used for premium phones with F1.5-F2 apertures.

But, of course, it'll require good light. Still it is positive thing to see 1080p at 1000fps on phones. They even have some use for measurements, maybe we'll get one for our lab.

@Kob

We can see new generation already this year in 1" sensors, may be APS-C later in year.