Knowing what color distribution, but mainly how many lands your opponent has available to him or her the next main phase is vital information. However, at least on iOS you cannot see the information about tapped lands. It simply shows up as a stack of four taped lands. It would be incredibly helpful to be able to tap the stacked lands and see it pop up with their land distribution much like your hand, sideboard, deck, exile, well actually almost literally everything else except for lands