I won't argue that all interfaces to digital devices have reached a good set of intuitive interfaces, it's clear they haven't. If we're just talking about desktop computers though, I think we're much closer. That said, of the first three groups you mentioned, I think there's relative examples in our analogy group. Workstations (in the professional sense) are like the semi-specialized vehicles that people use. Rock crawlers, off-road vehicles, etc. Mobile is like motorcycles. Each provides the same essential service, but the amenities, configuration and details wildly differ.