That's why a hybrid UI is the key. iPad OS can already use a keyboard and mouse/touchpad. iPad OS has already evolved beyond just touch. The perfect OS will let you use either according to your needs and use case.The question is, how much evolving is actually possible?! I mean, you can only get so far with a touch-based UI. The success of mouse-centric UI's is partly related to decoupling clicks and movement. This is not fully transferable to a touch-based UI.