After studying a lot of resources, I came to the conclusion: Nikon Z9 & Sony A1 are worthy of our attention. Thanks to them, we will get excellent quality photos and videos. If we want a camera with a smaller form factor — Sony A1, and sat down with a larger form factor (pro DSLR) and SLR with a built-in vertical grip and a larger capacity battery — Nikon Z9.
According to rumors, Nikon plans to release a firmware update for the Z9 camera early next year. This camera will be able to record 8k 60fps video. The Nikon Z9 wins with superior burst shooting, video, autofocus and stabilization, while the Sony A1 takes over for resolution, ISO and electronic viewfinder.