The problem is this notion is not able to be disproved. While I'm completely confident that 10 years from now the Mac will still be open enough to be considered a "real" computer, I'm also confident that 10 years from now someone will be predicting its imminent demise because the water just keeps boiling hotter and hotter.
So we'll keep having this argument (and the argument over whether apps will be installable in the future without Apple's permission), over and again, year after year.
