Fuschia is a container OS
There's a success story bubbling away with Fuschia.
Get a touchscreen Chromebook that runs android apps and you'll glimpse the future.
Android apps on Chromebook give you low footprint yet functional and offline capable improvements over browser based services like email, office apps etc.
If you look carefully at the Fuschia documentation you'll find an OS that is all about data flow.
Ledger allows data to be offline with sync.
Flutter, according to the Fuschia glossary:
"... is a functional-reactive user interface framework optimized for Fuchsia and is used by many system components. Flutter also runs on a variety of other platform, including Android and iOS. Fuchsia itself does not require you to use any particular language or user interface framework."
Fuschia, providing some simple Android porting tools, will replace Chromium.