These projects deeply, deeply capture my imagination for some reason, although I suspect that life on or in them would likely be pretty miserable. I am a little skeptical that people will be in this thing by 2025 if so far all they have is 3d-renders though. Same company that bought the condemned FLIP ship
Joseph Dituri recently finished a 100 day stint underwater[1]. It's described as "It's basically like a really small RV" and "One of the things that has surprised me the most is how much I miss the sun"
Honestly, I think it's like most things, some people would love it, some will hate it, and a bunch will be able to tolerate it well enough.
I guess depth is going to make a big difference too. I've eaten at an underwater restaurant[0] before that was shallow enough that it was bright and sunny (while still being very much underwater), and I could see that working well.