Like everything else, there are exceptions. The watches have not disappeared completely, in fact as we see that we are in a new battle in this field; and continue to use laptops, only that a mobile phone is now as powerful as a computer of 5 or 10 years ago.
You could add more objects to the list, teams that have been replaced by full or at least displaced by mobile: calculators, handheld game consoles, GPS, voice recorders… An almost endless list. And the longer it will be. (by Reddit)