We can still watch old Chaplin movie and love it. Because it's good. But if new movies were going to be released in 16fps then nobody would watch that (if it's just one movie people might go because of the novelty). Especially for action movies, there is no excuse not to reach 48, and better 60 fps, since we now have the technology to do this.

Peter Jackson and James Cameron are precursors and they will have the knowledge and the technique before everyone else when everyone will start making 60fps movies.