Nikon has released eye AF firmware updates for Nikon Z6 and Z7. Here is the video comparison of Sony a7 III Vs. Nikon Z6 Vs. Canon EOS R on eye AF. From the result, we can see Sony a7 III’s eye AF is still much better than Nikon Z6 and Canon EOS R.
Tomorrow, Nikon will officially announce the new Nikon Z6, Nikon Z7 full frame mirrorless cameras to compete current Sony a7 III and a7R III. Here is the specs comparison of Sony a7 III & a7R III Vs. Nikon Z6 & Z7: