Sony issued a new firmware update for the new Sony A7V:

Benefits and Improvements

• Fixes an issue where noise may appear in the preview image embedded in RAW files captured with the RAW & HEIF setting
• Fixes an issue where the camera may not power on after being turned off while the Connect while Power Off setting is enabled
  (under Network → Connect/Remote Shoot)
• Improves compatibility with third-party CFexpress Type A memory cards
• Improves the operational stability of the camera

Sony A7V preorders:
In USA at at BHphoto , Amazon , Adorama , Henrys .
In EU at Fotokoch , FotoErhardt , Calumet , Foto Köster , WexUK , Clifton , Park UK , Fnac FR .
In Australia at: Camera Pro , Sony Australia .