I think the react-native style architecture is the way forward. Mainly, thinking of the UI as a state-machine, and managing that state from a cross-platform run

I think the react-native style architecture is the way forward. Mainly, thinking of the UI as a state-machine, and managing that state from a cross-platform runtime. The reality is every platform offers it's own encouraged design patterns and to create the best UX you need to maintain builds for each platform. In the next 5 years I don't see JS being replaced as that cross-platform runtime, but maybe a transpiled strongly typed language could become defacto.