One of the major changes in this update, however, is the inclusion of fully unattended installation



From Muktware:

This new update brings a lot of fixes. One of the major changes is the inclusion of fully unattended installation. Thanks to this update, the SteamOS can now be installed without having to login multiple times in to Steam or the desktop and then having to run scripts manually to complete the install. All of that are now taken care of automatically thanks to the unattended installation.

Other changes include fixes for Gigabyte Brix systems that also offer better stability and performances along with the addition of the Bluetooth driver, which was previously missing for these systems. All firmware packages are now pre-installed so it makes life easier for a user. Another significant inclusion is the updated AMD graphics drivers, so people with AMD systems can utilize the features unlocked by the updated drivers.

  Latest SteamOS update brings many fixes, improvements