This is part of the point I'm making.
Kids that went crazy for Power Rangers (understandably so..bright colors...col weapons...robots...karate) at age 6 or 7 must not look back on it too fondly now...they see it for the silliness that it is.
I was nuts for Star Wars, Raiders and Superman:The Movie and I think, objectively, damned right to do so!
I saw Battlestar Galactica's pilot episode in the theater(yep...they showed it in the theater there!) when I was a kid when I lived in England and was ga-ga over it. I watched it again at age 13 or so and already saw through it.
There's plenty of crap and good stuff for each generation. I was a kid in the era of Power Rangers (never really watched it, though) up to the mid-late 90s. We also had The Princess Bride, The Cosby Show, Star Trek: TNG, Terminator, The Neverending Story, A Muppet Christmas Carol, Muppet Treasure Island, Don Bluth animated films (Secret of Nimh, An American Tail, Land Before Time), Jurassic Park, ET, Batman (both animated TV show and Tim Burton movies), the Disney age of Aladdin, Beauty and the Beast, The Lion King, Toy Story....
Kids growing up now may have Hannah Montana and Twilight, but there's also shows and movies like the new Star Trek, anything Pixar makes, Lord of the Rings, Spider-Man, X-Men, Harry Potter, and who knows what the next big (quality) thing will be? Something always comes along eventually.