There was an article recently on how
'Harry Potter' and 'Lord of the Rings' changed the future of Hollywood.
The article talks about how these film franchises brought fantasy to the masses. Because of them, fantasy media started getting backed with the huge budgets normally reserved for other types of films. As someone who was a child in the 1980s and a young person in the 1990s, I remember when fantasy budgets were much smaller. Chris Pine's salary for the D&D movie isn't unusually high these days, but big budgets for fantasy media were not always the norm.
The article also brings up a topic previously mentioned in this thread -- that 'Harry Potter' and 'Lord of the Rings' started the push toward Intellectual Property being a bigger draw then movie stars. The Marvel movies are the most ubiquitous example of IP dominance. I do think there is some truth to this. For the big-budget tentpole movies, people are more likely to go based on the IP rather than the movie star.
But I think movie stars can still have an impact. There used to be a vibrant range of mid-level movies when I was younger -- films that were smaller than a big-budget tentpole but bigger than a little art-house flick. The aforementioned
Knives Out is an example of the kind of excellent mid-level movie which doesn't get made as often these days. It is at this level I think movie stars can still have a major impact.