This seems to be different from Android Instant apps which are limited to a 4MB apk which is too big for Flutter. In the video they demonstrate a video game called Clash Royale which has a demo module that can be run without downloading the entire app. I don't know which game engine it's running on, but on the
interest form for Google Play instant they reference Unity and Unreal which presumably would require a larger apk size. I was wondering if this new system could be used by the Flutter engine as well to make instant apps.