1. Kids get bored quicker, This year, I've left the cinema four times before the movie finished because the kids were bored. This makes me less likely to go back, they prefer to stay home on the xbox/lappy or go out for pizza/bowling instead.
2. Mass appeal movies are shit. There's just no quality or focus anymore, every movie is trying to be everything to everyone and ends up crap.
Don't get me started on the overuse of CG.
Instead of learning from filmmakers, the CG guys picked up tips from animators, that's why every CG creature walks and talks the same, with over emphasised, unrealistic, and ridiculous movement patterns that don't fool anyone and ruin the moment. You know why Jurassic Park is still awesome? and ghostbusters, and all those other heavy animation movies? Because they don't look obviously fake.