this post was submitted on 24 Jun 2024
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OLEDs were built in 1987 I saw my first VR demonstration in the 90s (and it wasn't cutting edge then). I saw my first AR demonstration then as well as part of an undergraduate engineering fair. And so on. I just looked up maglev trains - in commercial use since 1984.
I don't disagree that there hasn't been refinements, improvements, or commercialization of technology, but there hasn't been a technological leap or invention that I can think of in the 21st century.
3D printers were a 21st century invention, I think.
Quadcopters and other multirotor designs resulted in an incredible leap in affordable cinematography, racing applications, rescue, mapping, and warfare.
A lot of 3D printing patents from the 80s and 90s expired between 2010-2020, clearing the way for commercial 3d printers and a million innovations. I'd call them honorary 21st century inventions, since the patent holders squandered the technology in the 90s.
https://www.finnegan.com/en/insights/articles/how-patents-die-expiring-3d-printing-patents.html
We had a 3d printer in the 90s at my Uni. It built layers with laser cut paper lol. It was the cheapest version available and it lived in the engineering department for rapid prototyping. This link says they were invented in 1981, metal sintering was added in 1988 and fused filament in 1989. https://ultimaker.com/learn/the-complete-history-of-3d-printing