Desktop PCs are not going away anytime soon, and nor are traditional laptops or slate-style tablets. But all are retreating into their core niches and therefore selling in decreasing numbers. In future, most of us are likely to use hybrid tablet/laptops.
The history of client devices in recent decades is essentially one of increasing portability, as the tech industry’s focus has shifted from desktop PCs to wireless-connected laptops, tablets and smartphones, and most recently smartwatches and other wearables. Most people, in the developed world at least, now own multiple devices in different form factors and utilise numerous apps (desktop and mobile) and back-end services (cloud and web), both for personal and work purposes.