I know about the recent stuff using DNA as a storage medium. I am interested in writing a story where humans have mastered everything Evolution has to offer; a time when technology is completely integrated into a vivarium/Bioregenerative Life Support System like ecosystem on multiple levels.
I’m looking for references to better speculate about organic compute as a complete replacement for silicon in a very distant future.
The Inverted Frontier series by Linda Nagata is sort of what you’re looking for. It’s not hard sci-fi, but it has a strong emphasis on organic computation. Books so far in the series are: Edges, Silver, Needle, and Blade.
There’s a three book prequel series, The Nanotech Succession as well. It’s not required to read it before The inverted frontier but it’s quite good so I would if I were you.