Re: UI must fully switch based on context.
Exactly. Application needs to change UI based on context. It's not impossible for any good designed application where the UI and the logic are fully decoupled. It's more or less what MS is trying with UWP, but the attempt to make it automatic will fail.
The application designer will need to understand what features are to be offered in each mode, and how. In touch mode the need to use bigger UI elements on smaller screens will inevitably mean some features won't be available. On the other hand, on larger screens and keyboard/mouse input will mean large elements becomes ugly, waste space, and more complex features can be made available.
One size doesn't fit all.
Biting the hand that feeds IT
