Really? The decline of religious people? What did religion have to do with Halloween,the thing,alien and pretty much all of the classic horror films that helped define the genre? A good horror film does not depend on superstitious people.
As far as Mad Max is concerned,was it not something like 90% of the CGI effects were used on improving the landscape of the film? Which is fair enough, I believe CGI is best used for subtle changes or when there are no other options. I just hate the fact that Jurassic Park(a film from the early 90's) is visually more impressive than the recent Jurassic World. In my opinion the reason is practical effects(in this case puppetry),the look and texture to Stan Winston's dinosaurs can not be beat with visual effects. I'm aware that CGI dinosaurs were used in that film but sparingly when there were no other options. You end up with the perfect blend of both practical and CGI which most films should strive for. Just seems nowadays people are getting lazy and believe the answer lies in post.