The Harmonia format would be pretty awesome applied to nonfiction, I think (e.g., crowd-sourced marginalia). Closest application I can think of is Fermat's Libr

The Harmonia format would be pretty awesome applied to nonfiction, I think (e.g., crowd-sourced marginalia). Closest application I can think of is Fermat's Library [1]. I was initially skeptical but found Wattpad's tap stories pretty awesome in practice [2]. Generally though, you're right, the "killer app" hasn't been discovered yet. But I certainly find the innovation exciting! [1] https://fermatslibrary.com/s/bitcoin https://fermatslibrary.com/s/bitcoin [2] https://taptaptap.co https://taptaptap.co