Windows 10 fans have a new feature to look forward to that is currently being rolled out in the latest Windows 10 Redstone 4 (Insider Preview Build 17063). The new feature was previously promised, and Microsoft has delivered the Timeline feature, if a bit later than expected. This test build is available now to those on the Windows 10 Fast

Source: Hot Hardware – Windows 10 Timeline And Innovative Sets UI Arrive In Latest Redstone 4 Build