It’s really not surprising Cook is not a fan of PC purchases, given he sells Macs and iPads (and iPhones) lol. And Jobs also thought far fewer people would need desktops or laptops; I’m sure you remember the truck analogy.
You may not like it, but tablet computers—or even iPhones— are replacing PCs and Macs, whether notebooks and desktops, for many, many people.
That’s not a prediction, it’s a fact. Since the iPad came bursting in to the scene, desktops and notebooks have been in decline. Combined, they sell about a hundred million fewer units than six or seven years ago. Apple sells more than twice as many iPads as Macs, for many years now.
Macs have actually bucked the trend, pretty much maintaining their unit volume against an overall contracting market, so Apple has actually increased its market share with respect to PCs.