From the article:
> Although it’s not one single long exposure, Google’s night mode still gathers light over a period of a few seconds, and anything moving through the frame in that time will turn into a blur of motion.
Right, but it's up to them how to process information coming in during these few seconds. Without a tripod it would be just a big blur without separating data into some frames. I don't think optical stabilization would be enough for such long exposures.