David Foster was the Vice President of Hardware Product Development for Google, and oversaw the Google Home and Pixel devices, even though he came on board after the Pixel (phones by Google) were already well into their development. Apparently it wasn’t the gig he was hoping for, because he has left Google and is moving on to whatever else is next.
He came to Google from Amazon, where he was working with the group that developed the hardware for the Kindle and Echo speakers. He has also previously held hardware positions at both Microsoft and Apple. We wish him good luck in his future endeavors – David Foster, as a Google fanboy, I can say “we hardly knew you.”