Windows 10 build 10540 has had its release notes leaked ahead of release. This particular build is expected to be part of the Threshold 2 update, but you'll not have to wait until it hits your PC to see what's coming your way.
As detailed in the leaked documentation, the main change in build 10540 is jump lists for Windows Store apps:
"You can now build jump lists for Windows Store apps (immersive apps). Note that the jump list content will now also be available from tiles in Start and the All apps list, in addition to the taskbar and the Most Used list in Start."
It's positive to see Microsoft bring across jump lists to Windows Store apps, as the feature was restricted to desktop apps. You can check through the release notes over on WZoR's website.