Is a good or bad thing to higher the curfew age?:
Better.  I missed the last change by a few months, so I know how unpopular this sounds.  

Kids seem to be older, wearing makeup, hair gel, stylish clothing, and designer accessories in elementary school.  I wished I could look like an adult when I was small.

Kids own a wardrobe of electronic gadgets too.  They are desensitized to content like death and sex at an earlier age.

What does this mean?  Kids grow up faster?  Maybe on the outside.  If you take away all of these external modern devices, emotionally, they grow at a natural pace.  Perhaps with so many distractions, overstimulated kids need more time to catch up to the quiet time they missed.