SITUATION EXPLAINED: The Google Shakeup. @sundarpichai: Hassabis "stepping up" to become Chair of Google DeepMind and Chief Scientist of Alphabet, while continuing to lead Isomorphic Labs @koraykv becomes SVP, taking over model development, GDM research, and the Gemini app after 13 years at GDM @demishassabis: "We have arrived at a pivotal moment in human history. I've been working towards AGI my whole life and now, like many of you, I feel it is close at hand" @JeffDean is leaving after 27…