I in fact don't. The wave starts earlier.
> 3D now being an option in cinemas everywhere
It's an option that not many people pick. Even before the pandemic, 3D ticket sales were declining: https://www.flatpanelshd.com/news.php?subaction=showfull&id=...
And it has rebounded less well than 2D: https://www.statista.com/statistics/259987/global-box-office...
Compare that with the introduction of color or sound, and it's pretty obvious that 3D films are at best a niche. I haven't heard of any 3D film that's offered only in 3D. Even Avatar 2 is available in 2D, suggesting that even James Cameron, one of 3D's biggest proponents, considers it optional.
Will theaters keep offering it? Probably, but theaters are a business in decline and so are desperate for anything that gets people coming in. Just looking at some theaters selling Avatar tickets, 3D is treated as an amenity like Dolby sound or reclining seats or "plush rockers", whatever those are. Perfectly nice, but hardly the stuff of societal transformation like Zuckerberg is hoping for.