I don’t think so, but I’m not certain. I’d recommend joining the testing group here on Meta so you can see how it works.
With this change, New and Unread are brought together under a single “New” list, but with subtabs to distinguish between new topics and replies. So there’s still a way to review those lists separately, but the one-click view shows them all together:
Please note that we’re planning to make this a change to the default setting for new sites; we will not be forcing existing sites to use this system, and new communities will be able to use the legacy New / Unread lists if they prefer.