The next software update for HoloLens is coming early next year

[Windows Central]

HoloLens is set to receive a new software update in early 2018 with new features and changes for developers and businesses.
The last major HoloLens software update to have been released was the Windows 10 Anniversary Update, which dropped in mid-2016. Since then, Microsoft has released two major Windows 10 updates, those being the Creators Update and Fall Creators Update, but oddly none of those releases were ever made available for HoloLens.

Full story from the WindowsCentral blog...