This is more of a humor (obviously), but<p>* Blockchain - this is usually the first that comes to mind.<p>* Rust - "hmm, where would I use it now?" is the question you'll ask if you just learned Rust but knew C++ already.<p>* Vulkan / Direct3d12 - yes, you now have the ability to recreate your own driver from scratch, but who has time for that? Even Microsoft Flight Simulator uses Direct3d 11. GPU ray-tracing will force you to use one of those though anyway.<p>* WebAssembly - at least in it's current state.
Giving electric cars extremely long range. It would be much more sensible to make substantially cheaper electric cars that have ~75 mi of range, and combine that with a program that gives free rental credits for any hybrid/PZEV car to owners of that car.<p>Then you can have a cheap eletric car but get access to fuel-based cars when you go on a trip.