Recapping Flutter 1.0 announcements: blog
The primary target for Flutter has so far been iOS and Android. Yet our ambitions for Flutter extend beyond mobile to a broader set of platforms. Indeed, from the outset Flutter was architected as a portable UI toolkit that is flexible enough to go wherever pixels are painted.
Observing Dart and transition to Capabilities in web and other UI development. Google is being very smart building the developer ecosystem for mobile before fitting it on to a new capabilities based microkernel. An exercise in persuading developer adoption through extreme agile.
See Flutter Client for FedWiki.