I'm not one of those people who is nastalgic for the good old days. That's because looking at a beloved old movie, book, or computer game usually leads to the destruction of that good memory. We remember things being better than they really were.
One of my guilty pleasures in life is comic books. I have comic books from the 50s, 60s, 70s, and of course contemporary ones. The golden age of comics wasn't. Simplistic plots, poor artwork, and cliched premises were the norm. Today's comic books are far superior in every way to the golden age or silver age of comics. Looking at an X-men comic from the early 70s is enough to cause nauseau.
The same is true of movies. Go back and watch a "classic" movie from the 50s or 60s. Better yet, go and watch one of the movies that won "best picture" in the 50s. Poor acting, plot holes, and melodrama galore. There is gold intermixed in there too. But I can't name a single movie that would stand up in today's competition, especially in terms of acting.
There is a lot of sewage on television today no doubt about it. But there was always a lot of garbage on the boob tube. But do a direct comparison. Justice League vs. Superfriends. Heck, any popular children's cartoon today vs. what we had as kids. Yea, there's Pokemon junk but we had Ultraman and Voltron!
Even fiction books today. If you scrape through the centuries you can find many good books. But read Hemmingway afresh and tell me that there's genius in there? Because I sure don't see it. A good writer of the 30s is not necessarily competitive today. We have plenty of junk but I'm not comparing the typical book of today to the best books of all time. Just the typical vs. typical in both cases.
Today's popular science fiction is also much better done. Compare The Incredible Hulk or The Greatest American Hero to say Smallville or even..shiver..Enterprise. As crummy as Enterprise is, it's gold compared to the drek that was being shown at prime-time. And before someone talks about Battlestar Galactic or Star Trek TOS, go back and watch them. BG was very cheesy most of the time. It doesn't hold up well. ST:TOS has about 20 good episodes. Intermixed with things like "Spock's Brain".
Many things in society may not be what we want. But when it comes to entertainment, the art of it has definitely improved.