In 200 years this is going to be like when we discover yet another proof of Euler or Gauss, 20 years after a current mathematician arrived at the same result.

Or it could be like multipoint touch screens, early version of which were a solved problem in 1980s or earlier, and just needed compute power to catch up, which it did over subsequent decades.

Or it could be like code=data and homoiconity and other CS fundamentals that were figured out 40+ years ago, but are still mostly ignored by software industry/culture.

Kinda but often times such research isn’t even “waiting on the shelf”. You can see that in the Iceberg paper which describes how earlier constructions optimized for PMEM Hw did a bad job because they were built against simulated hardware. In practice you need to actually iterate with real designs.

I doubt such designs will find practical uses (iceberg maybe but the pure math designs seem unlikely).