As a car enthusiast, I can think of a good one, the Ford Nucleon.
During the 1950s and 1960s, there was considerable interest in nuclear power and its potential applications. This led to the idea of using nuclear energy to propel cars. The concept behind a nuclear car was to utilize a small nuclear reactor to generate steam, which would then power the vehicle's engine.
Of course back in those days, this was extremely futurustic and some at the time thought this would be a game changer, but ultimately, the safety aspect was one of the biggest reasons why this idea was dropped, and I probably don't have to explain why it may not have considered to be safe, I mean, it was using nuclear power, so even if the engineers tried to make it as safe as possible, IF something went wrong, it would have been catastrophic.
Ever since then, the interests in the automotive sector has shifted to Electric and Hydrogen.
Still, a very intriguing concept car and idea.
Outside cars, you have blimps, and I personally believe if we tried to make something like a hindenburg today with existing technology, we might have been a lot more successful than back then (as it goes way back to 1930s), there are still some blimps used occasionally, I also don't believe those use hydrogen(?), but they are not the "game changer in air travel" it was once seen as, although we can't rule out a comeback.
What about you guys?
Nuclear for sure. Reading old science fiction from the '50s is pretty eye opening on what promise it appeared to hold.
In my lifetime, the Genome project. I'm sure a lot of good has come of it, and will continue to do so, but when they first decided to try to decode the human genome, the promise in the air was eradication of so many diseases, increased health and longevity to humanity, etc.
The Internet for sure. It went from something that would allow the entire world to access knowledge, be better informed, make the future a real meritocracy. Instead, we ended up with magats, vaccine-effectiveness deniers, and aggressive stupidity.
The human genome project has been very successful at progressing genetic medicine.
I am willing to accept the absolute worst of humanity on the internet, because we can also have so many amazing things that weren't previously possible.
Accessibility of information to the masses is incredibly important. Isolated populations can learn about the bigger world, get help, and share their experiences. Friends and families can stay connected. People can work together from anywhere, and create value as a team in ways that weren't previously possible. When I was a kid it was just a dream, and now we are living it.
This is true, a lot of people, especially some people from older generations like to talk shit about the internet and modern age (not just social media), and it's effects on us which can be bad but that also depends on the person, with good moderation, internet really is a dream come true isn't it? And we are living it.
Something we shouldn't take for granted for sure in a way.
The Genome project is very interesting for sure, and wow, I am learning a lot of knowledge from others here on this thread because there are some stuff that I had no idea existed before.
Fun fact, we are currently on the 38th major revision of the Human Genome (Google GRCh38). In the 20+ years since we completed the project, we've been able to design 100s of thousands of kits for genetic testing of human genetic diseases, anything from inherited diseases like Huntington's to developed diseases, eg, cancer. Within the world of biotech, it's one of the greatest achievements of all time.