https://thenextweb.com/google/2018/06/14/it-sure-looks-like-google-is-trying-to-make-pixelbooks-run-windows/

A few months ago, we reported that Google might be working on a way to dual boot operating systems on its Pixelbook, thanks to mysterious references to ‘Alt OS’ in a firmware development branch.

Now there’s even more evidence pointing towards the ability to run Windows somewhere down the line.