Re: desktop OS's will be the minority by 2020 (?)
First, the serious business. Reality dictates that a desktop and a mobile device cannot serve the same function. So there will never be convergence, except where our need do. So most will get that, as most just want to browse or watch.
However I doubt my phone will ever have 4 usb ports, or parts I can swap out in 3 mins at £20 a pop.
Second, non-serious, phones do not have an "OS" they have a "SOC", "System of Control [of the user]". ;)
Biting the hand that feeds IT
