This makes no sense to me given Google's emphasis on improving the tablet experience in Chrome OS. So they're probably just going to focus on clamshell chromebooks and 2-in-1s.
Looks like it's back to the iPad Pro when the time comes to move on from the Pixelbook.
I believe you are correct, Google mentioned awhile ago that they wanted to focus on ChromeOS as the successor to AndroidOS. ChromeOS initially on 2-in1s then onto mobile devices. Considering one can run android apps on ChromeOS, it only makes sense to redirect the focus to make a compelling product. Chrome books have seen wide acceptance in many schools, I think it is a good move.