@Smerf
There will likely be a significant number of desktops for a decade or two, but their ultimate demise is pretty much certain.
Like the car would lead to the demise of the bike, the television to the demise of the radio etc.
I think they will coexists or it will become a hybrid of both.
Take a tablet placed on a foot and handled by a bluetooth mouse and keyboard with a more conventional WIMP interface. Would that be a desktop machine or a tablet ? I would say it is both.
greets,
Staf.