Multitasking
You can now run multiple - meaning "up to three" - applications at the same time.
Input improvements
You can now connect a normal Bluetooth mouse to your HoloLens, and the HoloLens clicker has been fine-tuned to enable resizing and moving of holograms.
Voice improvements
Microsoft has added some new voice commands. For example, when viewing a hologram, you can say, "Face me!" to re-orientate it. You can also say "Bigger" or "Smaller" to resize a hologram, and you can move an app by saying "Hey Cortana, move [app name] here".
Edge improvements
Microsoft Edge now supports many of your requested (and obvious) feature such as multiple instances of the browser, a custom HoloLens New Tab page, Tab Peek, Open in New Windows, and various power and performance improvements.
Photos improvements
The Photos app now supports the pinning of pictures without any borders or chrome. Your walls will never look the same, Microsoft says. It also now streams videos from OneDrive instead of having to download the entire video before playback.
Easier development
Now, you can now browse, upload, and download files through the Windows Device Portal, and you can access the Documents and Pictures folders and the local storage for any app you side-loaded or deployed through Visual Studio.
Emulator improvements
Now you can sign-in to the HoloLens emulation with your MSA just as if you do with the real device. There is a new build of the HoloLens Emulator as well, by the way.
Video playback improvements
2D (or "flat") apps will now hide the holobar and cursor when you are watching video full screen.
Groove Music app
Microsoft's Groove app is now on HoloLens.
Take screenshots
Now you can take "mixed reality pictures" by pressing Volume Up and Volume Down simultaneously. You can then share these pictures via Facebook, Twitter, and YouTube.
Storage Sense
Storage sense lets you view remaining and used disk space by the system and apps in the Settings app.
atlast they came up with update!!!!!!!!!!