Yes, desktops and laptops are two different form factors that address completely different use cases. Laptops made up the "mobile" market before the smartphone era. The power/thermal requirements, as well as peripherals for a laptop all need a completely different solution to create a reasonable user experience. Desktop UX innovations haven't seen much recently beyond all-in-ones. Most people these days don't even have a desk they could put it at, let alone enough room at the desk. And the under 18 crowd does everything on their phone or on a tablet, often not even needing a laptop.