The latest market research from the Gartner group indicates that the market for PCs has experienced its "sharpest decline" since 2013. However, it seems this year-on-year drop in shipments, which applies to the first 3 months of this year (1Q2020), is related more to the Covid-19 pandemic rather than to demand for this category.
https://www.notebookcheck.net/PC-shipments-dropped-by-12-in-the-first-quarter-of-2020-Gartner.461597.0.html