That seems like a technology centered view. Nielsen is talking from the field of Human-Computer Interaction where he is pioneer, which deals with the point of view of human cognition. In terms of the logic of UI mechanics, what about mobile is different? Sure gestures and touch UI bring a kind of difference. Still, from the standpoint of cognition, desktop and mobile UIs have fundamentally the same cognitive dynamics. Command line UIs make you remember conmands by heart, GUIs make you select from a selection offered to you but they still do not undestand your intention. AI changes the paradigm as it is ostensibly able to understand intent so there is no deterministic selection of available commands. Instead, the interaction is closer to collaboration.