People have been saying this for a long time, and they are always wrong.
Perhaps it's all that science fiction I read in my early teens. When you're suspectible to it (and I was) it stretches your brain and it never goes back to normal.
I keep up with science and technology and it's why I know that the supply of energy is going up and prices are dropping. Prices are going to keep dropping, too. One of the reasons is the advancements in nuclear reactors, which are getting smaller, safer and more powerful. Now they're coming up with stuff I've never heard of before. Molten salt reactors?
If nuclear reactors weren't safe (except for the idiot Russians and Japanese) we wouldn't have nuclear-powered subs.
I wouldn't be surprised if someday some sort of Stargate wasn't invented. And that would be cool, just about as cool if some sort of warp drive was invented.
Only time will tell.
The pessimists are always wrong. I can remember when Paul Ehrlich, who has never been right, was claiming the world was going to starve to death. Now we have more food than we know what to do with, and it's been given away at food panties. Food is easy to find.
Global warming! The ice caps melting! Bee genocide! It's all crap.
Innovation is never is never going to stop.