Based on Seedance's latest offering, it seems unlikely that writers or actors are under any near-term threat...although the working environments for both will change radically.
Likewise directors and art directors - a feature is a lot more than a mix-and-match collection of moving images.
The number of crew people, artists and support people will be slashed perhaps as deeply as by 90%. Likewise the bloated management layer of most productions. Post processing and effects work will become much faster and cheaper. The entire process of making and releasing films and TV shows will be accelerated.
All this within a decade. Because It's not happening within an industry that's financially healthy or has a bright future outlook right now.