You can't generalise. I don't watch many movies, but would agree that if you go by the ads for "summer blockbusters" they're all of a certain type (though who isn't looking forward to "Muppets most wanted"?
) but there are tons of really good movies made that only surface probably at festivals, in smaller cinemas, direct to DVD etc.
I guess if you said "The quality of summer blockbusters has really declined" you'd be right, although there really wasn't too far to fall for them, now was there? I swear: if someone else reimagines something or makes another superhero movie (or worse, reimagines a superhero movie that was already one (cough) Spiderman(cough)) I think I may just finish building my escape craft and leave this planet to its own devices.
Originality, people! It may not put bums on seats but it puts brains in heads!