I am not sure if this was mentioned at I/O but does anyone know how we would use compose when writing UI code for landscape devices or tablet/chrome os ?

everything will be defined in the code. you will be able to write conditional logic depending on the available layout size. you will always be able to this logic into a separate Composable function to separate responsibility. we should provide all the necessary building blocks to make writing of this really easy and examples/best practices

That sounds really nice, thanks for the clarification 🙂