I was going to post that the impact of higher FPS is likely too low to justify needing 4x higher processing power. But then the difference in reaction time between 30fps and 120fps is O(30ms). At 60mph that translates to almost 1 meter in stoppping distance. Tough call.
It isn't just stopping power. It is fidelity, confidence, and completeness of data. A camera quickly moving across a panorama opening/closing the lens every 1/30th of a second loses a ton of data compared to one opening its lens every 1/120th of a second.
Yea, but then you have to have 4x the processing power It's pretty easy to scale frame rates once you have stuff figured out, but I can see very good reasons to not have to try to get up to 120+fps right away. In addition, I'd imagine the ML they're using probably has a lot harder time distinguishing valid motion when the motion is 4x as small.
