Tonight in Redmond Microsoft is pushing out the very first update to the Display Dock used for Continuum on phones. The update takes the firmware of the Display Dock from version 3.0 to version 4.0, and there is no changelog posted yet (but there is a link to a 'What's new' that is not yet refreshed).
Updating the Display Dock is relatively easy and only takes a few minutes.
Full story from the WindowsCentral blog...