I cross my finger and hope Avatar sequels will revive 3D.
To be honest with glasses, 3D is only suitable for dedicated theatre rooms. That's why I think projectors still support it, but not TV.
Yes, that's where I watch mine (big screen theater room).
I find they are more enjoyable than tone-mapped 4K UHD, but I also find those files very pleasing too.
Recently watched Hobbit and Life of Pi and felt it was better experience than at cineplex.
Alita: Battle Angel involved James Cameron and was "real" 3D and it shows. Very nice to watch in 3D (also came with 4K UHD disc in box).
Trolls World Tour had a 3D Blu-ray release last month and that is at least one major to keep the format going for home video.
What's interesting, is that whenever I used to check cineplex show times the IMAX and/or 3D viewings were packed compared to the other showings.
Happened last year with Toy Story 4 (which was also released on 3D disc).