I believe it is laptops which tablets have made redundant, and desktops which actually have a more valuable usage case at this point. A laptop only makes sense

I believe it is laptops which tablets have made redundant, and desktops which actually have a more valuable usage case at this point. A laptop only makes sense if you need to set up a workstation for productivity in several locations, which limits the target market to traveling business professionals. Most people don't do extended productivity work from multiple locations, however. For people who simply need a mobile device for recreational use, a tablet is vastly superior, with its extended battery life and ease and comfort of operation. For those who only need to have a workstation at a single fixed location, a desktop is the superior option, as the large screen, full-size keyboard and mouse are positioned in an optimal ergonomic manner, with the screen at eye level, keyboard and mouse at proper height and distance, etc., allowing for extended usage without repetitive stress injury. A desktop for productivity and a tablet for casual mobile use represents the most comfortable, ergonomic and financially justifiable option for the largest segment of the market; it's laptops which are imminently doomed to niche relevance.