Devil is in the details though. The 6P uses a similar type of EIS that you can, say, add to a Youtube video after the fact. It examines the video stream and tries to determine camera shake and compensate. When it works, it works fairly well, but it depends on the ability to 'see'. If there is movement in the background, etc... the processing can get tripped up a bit and the stabilization will kick off until it can get a 'lock'
The Pixel does things entirely different. Google put all that work into Tango and Daydream, two technologies that, first and foremost, need to know exactly how the phone is oriented in space... its position, angle, motion... all of it. So the new camera draws upon that for its EIS.
We'll see how well it is implemented...