While it is true that Apple usually focuses on development for its own platforms, it also makes exceptions. In Cupertino there are teams assigned to Android (developing iTunes Music) and Windows, where they especially work on how the operation of Windows on Mac be as fluid as possible and the user experience is not completely diminished.
FaceTime
If you use your camera MacBook with Windows -For example for videoconferences with software that is not available on Mac- you are very interested in this update, since it significantly improves the performance of the camera for all users of Apple 2015 laptops.
The update has a total weight of 1,4 MB, and can happen very unnoticed because Apple has not integrated it into its automatic updates system at the moment, but it can be downloaded by hand from the Apple website.
It is likely that in the coming days Apple will integrate this patch into the Mac App Store for automatic installation, but at the moment there is nothing official about it and you already know that it is always better to cure yourself in health to ensure the best possible performance.
It is not that using Windows on Mac is the ideal situation, but if it is the case, at least you will have to be prepared with the latest compatibility improvements. Remember also that the launch of Windows 10 It is quite recent and it may not be the best idea to update on the Mac at the moment, although Microsoft ensures that there should be no compatibility problem if you run Windows 8 without problems.