Nice write-up. I've been popping my head on over to their project every few months to check out their progress. Something that's pretty cool is that they're using Flutter to write Fuchsia's UI [0].

My favorite thing about Flutter is that it looks like they took some heavy inspiration from React. If anyone reading this isn't familiarized with React, or they don't really "get it", I'd highly suggest reading the Removing User Interface Complexity, or Why React is Awesome [1].

One of the big problems with implementing a UI toolkit is having to re-implement everything relating to accessibility. Although it's totally understandable that they're still focusing on the core.

Something I'd be interested in seeing is how Dart and Flutter might affect battery life. I'd expect the stock UIs to be pretty well optimized by now, but I have no idea how Dart stacks up in performance.

[0] https://github.com/fuchsia-mirror/sysui

[1] http://jlongster.com/Removing-User-Interface-Complexity,-or-...