Microsoft keeps adding improvements and features to the Mobile OS on the regular.
The latest is this screenshot above which shows an unreleased Mobile build of Windows 10 with a camera button right on the lockscreen.
This feature which has been available on Android and iPhone for a while now is finally coming to Windows 10 Mobile.
Higher end Lumia's like the 830, 950 or 930 amongst others which have physical camera buttons would need this feature though, as you can use their physical camera button to quickly launch the camera even in lockscreen mode.
It would be nice if Microsoft allowed users (in the near future) to customize the use of the other nav keys, it would be nice to change the windows start button for example to something else like Onenote for instance (to quickly take notes)
What do you think? Is this a welcome addition or would you like to see something else implemented on the lockscreen.