Last time, TV's started adopting 16:9 en masse, right? Well, TV's aren't adopting 21:9 the same way… or at all. Although I'd be lying if I said I wouldn't love to see some.That is very very quickly changing. Just like it did when we moved from 4:3 to 16:9. No stopping it now either as other media like shows on Streaming Services and Cable TV start to use it.(The Mandalorian, StarTrek Discovery etc etc). The creep to it be coming the new common standard has already started and it's not going to stop.
What has happened before, will happen again