I think it can be hugely advantageous if it's an optional functionality. Switching to another app is slow, whereas responding to a popup is fast. On phones, it

I think it can be hugely advantageous if it's an optional functionality. Switching to another app is slow, whereas responding to a popup is fast. On phones, it seems like a much better way of multitasking than having apps side-by side (I have a NoteII).