A new commit in the Chrome Gerrit is suggesting that Chrome Duplex, the new split menu view coming to Chrome for Android, is to be renamed Chrome Duet so as to avoid confusion with Google Duplex. Google Duplex, as you likely know, is the human sounding assistant that can call and make appointments for you through Google Assistant. Chrome Duplex is completely unrelated and has to do with a UI update for Chrome for Android, particularly for larger devices.
What Google is wanting to avoid is end users confusing the two duplex’s or assuming that they do the same thing – one on your phone and one in Chrome on your phone. They are two completely different technologies and thus a name change makes a lot of sense.