27-inch screen: room for two windows side by side
A 27-inch diagonal is the size many people settle on for desk work, because it's big enough to run two documents, a browser and a spreadsheet, or an email client and a chat app side by side without constant alt-tabbing. On a typical office desk it fills your field of view comfortably, so you scan information rather than scroll for it. That's real value for anyone moving up from a smaller screen.

