The iPad is nearly useless for content creation, it's a consumption device. The iPhone is limited largely to non-traditional content creation, ie text messaging (short messages) and perhaps taking pictures. Oh, and you might manage to call people--assuming you aren't left handed.
This has exactly 0 relevance to desktop usage, which is primarily about content creation and manipulation.
Likewise the iPhone/iPad have limited screen real estate compared to desktops and this necessarily makes their usage pattern fundamentally different from a desktop.
No, this isn't the year of Linux, because that hobbyhorse was always about replacing Windows with Linux. Won't happen any time soon.
And no, smartphones are not the mammal to the desktop dinosaur either...
