From Nikon Japan:
Thank you very much for using Nikon products.
We are pleased to announce that the download start date for firmware version 2.0 for mirrorless camera “Z 7 / Z 6” has been decided.
The download will start on May 16, 2019
This new firmware update will add Eye-detection AF, AF and AE improvements for Z6 & Z7. While CFexpress support and Raw video over HDMI to the Z6 and Z7 will not include in this firmware version 2.0.
1. Support for Eye-Detection AF for still image shooting (scheduled for release in May 2019).
Eye-Detection AF is convenient for portrait photography. The Eye-Detection AF in development will work not only with the AF-S (Single AF) focus mode that is convenient when photographing still human subjects, but also with the AF-C (Continuous AF) focus mode, which is effective when photographing human subjects that frequently adjust or change their pose. What’s more, the function is capable of detecting multiple eyes, from which the user can select the eye upon which the camera should focus, allowing the photographer greater flexibility when photographing multiple people to suit their intent.
2. Increased AF/AE performance (scheduled for release in May 2019)
AE (auto exposure) tracking will be newly possible in continuous high-speed (extended) mode, in addition to the AF tracking that existed previously. In addition, low-light AF performance will be improved, enabling faster autofocusing in dark or dimly lit surroundings with both still-image shooting and movie recording.