[GolDDranks]

Homomorphic encryption is a mind-blower. But I fear that we may never see it in it's fullest glory. It's going to be computationally too expensive or too impractical for reason or another. One can still hope.

[akvadrako]

Quantum computation gives your homomorphic encryption for free so there is some hope in a quantum-inspired algorithm.

[gnode]

Aren't ring confidential transactions (RingCT), used in some cryptocurrencies a form of homomorphic encryption which is being applied now?

[CuriousCosmic]

Monero uses ring confidential transactions as of now and zCash's zkSNARKs take advantage of some form of homomorphic encryption.

There are probably more but those are the ones off the top of my head.