Examples I remember most vividly:
History Channel – in about ’92, a college friend and I knocked around the idea one night of having a channel devoted to historic documentaries and analysis. (Official launch of H-Channel came in ’95, I think.)
Compact discs (sort of). Sometime in the early to mid-70s, I envisioned having a console in cars that let you insert 45s (instead of tapes). I thought it would be cool, but figured it was unlikely to happen.
This’ll bring quips of erroneous Al-Gore quotations, but sometime in ‘70s (again), I imagined a control-panel that allowed a person to ask questions about just about anything (I think through a microphone) and it’d spit out the response on paper. It was somehow connected to a central database that could access that information, whether significant or trivial. (This was before I knew what a “database” was). So I guess I pre-invented the internet, voice-recognition software AND Google.
Recollecting these things is making me feel like I wasted my potential.