They note that the M1 build kernel has been given a bump to 6.3 (Windows 8 uses kernel 6.2).
In addition, the images are supposedly from Windows 9 build 9319; Windows 8 was build 9200.
This might be a hoax or it might be signs of Project Blue (whatever the hell that is) or it might also be signs of Windows 9 development.
Who the hell knows..
What do you think?