Zenith made a good choice in my opinion, after a huge innovation in the technical field now they want to be more and more visible to share it with as many people as possible.
As you said Zenith is not so popular nowadays by people which are not so involved in watches, however I think that if they will be able to advertise their product well they will have a good success. They have heritage, history and now they are the most innovating brand if they can sum all those things up well they will manage to take the place they should have.
However Zenith has also some issues: the lack of an iconic watch is something serious because many people know AP for the RO or Patek for the Nautilus so a watch in which there is an important part of the brand's heritage is, especially nowadays, very important. As somebody says they want that the Defy Lab 21 will become the icon for Zenith but the "iconization" of a watch took time and Zenith does not have it.
Best.