at some point, the new effects will become dated as well.
Which is what makes all this revising of old movies so ridiculous. We really think we've reached the point now where cgi is so realistic that you can't tell it apart from something filmed in live action. That's it, we've reached the pinnacle of what we can do, it can get no better. I think that's how George Lucas feels. To hear him talk, Jar Jar Binks looked like a living, breathing creature that was filmed alongside the cast. And that "Han Shoots first" scene was just terrible. It looks like an effect from "Tim and Eric's Awesome Show." But George Lucas thinks it really looked like Harrison Ford moved his head to the side to dodge that blaster bolt.
I've got news for him. CGI is still in its infancy. 30 years from now, people will look back on the movies of today and laugh. You'll probably be able to scan your image and insert yourself as a character in movies and games.
Which is why I maintain that it's pointless to go back and "perfect" old movies, because you just can't do it. Something more realistic is always around the corner. Remember all the hoopla over the T-1000 in T2? That's positively amateurish compared even to the dinosaurs in Jurassic Park a couple years later. But it works, and it pushes the story forward, which is what effects are for. People have gotten to where the movies are all about FX now. They don't want intriguing plots, they want to be dazzled by cg eye candy. Let movies and shows remain a product of the times they were created in, damn it!