Windows Sets is a tabbing system that will work across Windows 10. Essentially a universal tab ability for applications. It works like tabs on a web browser, allowing users to open a tab in an application by clicking a + symbol in the title bar. A new tab will show recent apps, documents, and a search. According to Tero Alhonen, references for Sets are found in the Windows 10 SDK for version 19577. Last year, Microsoft said it was removing a definitive launch for the feature. While Redmond did not kill off the idea entirely, the company said it would not arrive until it was ready. The concept of using Windows 10 Sets is to be able to multi-task more easily without needing to leave an app you are in. However, Sets was delayed numerous times after its initial slated April 2018 launch.
— Tero Alhonen (@teroalhonen) March 10, 2020
Delays
After another delay in 2018, Microsoft revealed in April 2019 that Windows Sets was taken off the development cycle and effectively cancelled. Hopes were raised when a rumor suggested Windows 10 Insider Preview Builds would bring the tool before the November 2019 Update.
That did not happen, and Sets seemed to be permanently killed off. However, it now looks like Microsoft may still be working on the tool. A release with Windows 10 20H2 now seems likely if we are to see the feature.
