Overall, this is the most excited for ESO I've been in a long time. I've been outspoken in support for mmorpgs leaning more into ship travel and water based content for awhile now. Even mentioning it in a few of my ESO posts on this subreddit.

This is the kind of experimentation that not only the game needs, but the genre needs. Really hyped for the future ahead with this game.

EDIT: After looking into it some more, do temper your expectations around Naval Combat and Underwater Exploration. https://youtu.be/itUbAx7_KbE?t=1280 is the link to that part. But expecting something along the lines of Archeage or Guild Wars 2 may not be right. So just a warning. You may not be able to actually swim around or drive a ship. They haven't confirmed anything yet, but based on that footage; it may not be that. At least not yet. The footage looks like its in early in the life cycle. So it could become that. But until things are confirmed, I'd advise tempering the expectations.