Yeah, I think the reversal of the casualisation/simplification trend is here to stay; the late 2000s/early 2010s are gonna look like a weird abberation to people in the future.
What I am worried about is the average technical literacy of future developers.
In the 2000/early 2010s developers decided to simplify games by a deliberate choice, not for technical limitations or because they just weren't good enough to design complex games.
I think that in the future games will be still simple and linear, but this time not for a conscious choice, but just because they are simpler to develop in this way. We see this trend even now, when modern games, usually made with third party pre-existing engines, are technically less advanced than games made 10 or even 20 years ago.