Windows 10's "Sets" tabbed apps feature will no longer be implemented
Sets, which would have allowed Windows 10 users to group together different applications (such as Office, the Microsoft Store, and Edge) into one window separated by tabs, is no longer being developed and will no longer appear in upcoming Windows 10 updates.
The feature was originally scheduled to be implemented in the April 2018 
Windows 10 update, but was delayed. Following multiple changes in direction for the development of multiple apps that Sets targeted to support, such as 
Microsoft Edge's shift from a proprietary engine to the open source 
Chromium, the decision was made to cease development.
Though Sets will no longer be implemented, tab-based navigation will still be coming to the 
PowerShell console. This feature was originally announced alongside Sets, utilizing the same underlying technology. Now that Sets is no more, however, tabs in the console will have to be implemented without the use of Sets as a foundation.
In the meantime, tabbed browsing for PowerShell can be added using the likes of 
QTTabBar, 
Clover, and 
TabExplorer.
Further coverage:
gHacks Tech News
ZDNet
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