This is it. We will always need tools that do the things that what we designate "PCs" — computers with monitors, keyboard, mice, and peripherals — do best today. In absolute numbers, the sales volume of such devices may even continue to rise in the long run. But they will probably look more and more like our mobile devices, or they will be replaced by grown-up tablets.
History shows that in the short term the devices that are new have characteristics of the generation being replaced. But then they break away and things get redefined. The first word processors looked like typewriters. The first presentation packages focused on 35mm slides and "foils".
