Just had to go and check for myself 
The sea does still look pretty good and the coastal edges are detailed, but yep - the subsea texture has gone. I don’t for a moment imagine that they’re using an enhanced or special version for their video and based on the comments from the developers, these areas are being added manually, so there should be more and more progressively. I wonder if the last water updates undid some of that work?
But for Jolly Harbour, Antigua, we certainly aren’t getting what was shown in their showcase video. That’s a bit embarrassing.
Evidence … 4k, everything on ultra except clouds and trees, Bing map data and photogrammetry on, rolling cache deleted and reset (200Mb). Also corresponding Bing maps image:
